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— The Laboratory is committed to limiting the rise in electricity consumption to 5%, corresponding to a target of 1314 GWh, while significantly improving the performance of its facilities. A total of 1215 GWh was consumed in 2022 and the accelerator complex is now more efficient.
CERN is committed to keeping the increase in its water consumption below 5% despite a growing demand for water cooling at its facilities. Since 2000, CERN has radically decreased its water consumption by about 80%.
With respect to direct greenhouse gas emissions, CERN’s objective is to achieve a 28% reduction by the end of Run 3, which corresponds to a target of 138 300 tCO2e. In 2022, direct emissions of 184 300 tCO2e were generated. A comprehensive programme to ensure progress towards the objective is in place, which includes increased efforts by the experiments to limit gas consumption and work towards replacing current gases with more environmentally friendly ones.
— A recent study in Nature Human Behavior found that climate change disinformation was more persuasive than scientific facts. Researchers at the University of Geneva in Switzerland had originally intended to see if they could help people fend off disinformation, testing different strategies on nearly 7,000 people from 12 countries, including the United States, India, and Nigeria. Participants read a paragraph intended to strengthen their mental defenses — reminders of the scientific consensus around climate change, the trustworthiness of scientists, or the moral responsibility to act, for example. Then they were subjected to a barrage of 20 real tweets that blamed warming on the sun and the “wavy” jet stream, spouted conspiracies about “the climate hoax devised by the U.N.,” and warned that the elites “want us to eat bugs.”
The interventions didn’t work as hoped, said Tobia Spampatti, an author of the study and a neuroscience researcher at the University of Geneva. The flood of fake news — meant to simulate what people encounter in social media echo chambers — had a big effect.
— A recent study in Nature Human Behavior found that climate change disinformation was more persuasive than scientific facts. Researchers at the University of Geneva in Switzerland had originally intended to see if they could help people fend off disinformation, testing different strategies on nearly 7,000 people from 12 countries, including the United States, India, and Nigeria. Participants read a paragraph intended to strengthen their mental defenses — reminders of the scientific consensus around climate change, the trustworthiness of scientists, or the moral responsibility to act, for example. Then they were subjected to a barrage of 20 real tweets that blamed warming on the sun and the "wavy" jet stream, spouted conspiracies about "the climate hoax devised by the U.N.," and warned that the elites "want us to eat bugs."
The interventions didn't work as hoped, said Tobia Spampatti, an author of the study and a neuroscience researcher at the University of Geneva. The flood of fake news — meant to simulate what people encounter in social media echo chambers — had a big effect. Reading the tweets about bogus conspiracies lowered people's belief that climate change was happening, their support for action to reduce emissions, and their willingness to do something about it personally. The disinformation was simply more compelling than scientific facts, partly because it plays with people's emotions, Spampatti said (eliciting anger toward elites who want you to eat bugs, for example). The only paragraph that helped people recognize falsehoods was one that prompted them to evaluate the accuracy of the information they were seeing, a nudge that brought some people back to reality.
Norman says it's crucial that any intervention to stop the spread of disinformation comes with a "weakened dose" of it, like a vaccine, to help people understand why someone might benefit from lying. For example, when the Biden administration learned of Russia's President Vladimir Putin's plans to invade Ukraine in late 2021, the White House began warning the world that Russia would push a false narrative to justify the invasion, including staging a fake, graphic video of a Ukrainian attack on Russian territory. When the video came out, it was quickly dismissed as fake news. "It was a wildly successful attempt to inoculate much of the world against Putin's preferred narrative about Ukraine," Norman said.
For climate change, that approach might not succeed — decades of oil-funded disinformation campaigns have already infected the public. "It's really hard to think about someone who hasn't been exposed to climate skepticism or disinformation from fossil fuel industries," said Emma Frances Bloomfield, a communication professor at the University of Nevada, Los Vegas. "It's just so pervasive. They have talking heads who go on news programs, they flood media publications and the internet, they pay lobbyists."
Reading the tweets about bogus conspiracies lowered people’s belief that climate change was happening, their support for action to reduce emissions, and their willingness to do something about it personally. The disinformation was simply more compelling than scientific facts, partly because it plays with people’s emotions, Spampatti said (eliciting anger toward elites who want you to eat bugs, for example). The only paragraph that helped people recognize falsehoods was one that prompted them to evaluate the accuracy of the information they were seeing, a nudge that brought some people back to reality.
— Record-setting spending on clean energy in the US. A clean energy milestone in the world's power sector. A surge in lawsuits against polluters. Plastics manufacturers sued for pollution. A treaty for the oceans 40 years in the making. America's biggest dam removal. The EU promises to become forest-friendly. Deforestation of the Amazon slows. Upholding indigenous rights in Brazil. Climate cash for vulnerable countries.
— The global deal, approved without comments, calls for transitioning away from fossil fuels but falls short of seeking a phase-out. Critics argue that the deal contains loopholes allowing for the continued expansion of fossil fuels, including natural gas.
COP28 — (LINK)
— Research from the Energy Institute found that 82% of the world’s energy consumption came from dirty energy sources in 2022, leading to a 0.8% rise in planet-warming gases expelled into the atmosphere.
— "A 2 C temperature rise equates to a billion prematurely dead people over the next century. Direct mortal effects of climate change include heat waves, which have already caused thousands of human deaths by a combination of heat and humidity and even threaten babies. Intermediate causes of death involve crop failures, droughts, flooding, extreme weather, wildfires and rising seas. Crop failures, in particular, can make global hunger and starvation worse. More frequent and severe droughts can lead to more wildfires that also cause human deaths, as we saw in Hawaii. Droughts can also lead to contaminated water, more frequent disease and deaths from dehydration."
On the other hand, climate change can also cause flooding (and crop failures from too much water), which also drives hunger and disease. Climate change drives sea level rise and the resultant submersion of low-lying coastal areas and storm surges exacerbate flood risks, which are life-threatening for billions of people in coastal cities who face the prospect of forced migration.
Climate change also increases extreme weather events, which kill and cause considerable damage to essential services such as the electric grid and medical facilities. Salt water intrusion also threatens coastal agriculture, further reducing food supplies.
Finally, climate change also indirectly increases the probability of conflict and war. Although the academic consensus on climate-change-induced war is far from settled, there is little doubt climate change amplifies stress and can cause more localized conflict.
— More than half relates to nitrogen emissions — from fertilizer and manure used on land entering surface water and the air. Greenhouse gas emissions that contribute to the climate crisis account for another 30% of hidden environmental costs from food and agriculture. Land use change — clearing a forest to create farming land, for example — and water use account for another 14% and 4% of hidden environmental costs respectively.
— Most of the 17 west African countries have a problem managing plastic waste. Eight of them are among the top 20 with the least effective plastic waste management practices—up from five in 2015. Coastal provinces account for about 56% of west Africa's GDP and one-third of the population lives there.
— The Oak Ridge National Laboratory (ORNL) team utilized CRISPR Cas9, a powerful bioengineering tool, and combined it with an innovative AI editor to genetically alter microbes, paving the way for renewable chemicals and fuels. The AI editor decodes molecular mechanisms underlying guide RNA efficiency. Unlike other AI editors, this program boasts an explainable design, mitigating the notorious black box problem associated with complex AI systems.
— The number of people over 65 who died from heat rose by 85% from 1991-2000 to 2013-2022. Around 520 million more people will experience moderate or severe food insecurity by mid-century, according to the projections.
— It includes expert thoughts on racial and environmental justice, Indigenous climate solutions, and climate change's mental health effects.
— Fewer than 500 sperm whales are estimated to live in the waters surrounding Dominica, part of a population that moves along the Lesser Antilles chain, swimming as far south as St Vincent and north into Guadeloupe
— A team at the University of Tokyo has crafted a breakthrough with a plastic called VPR. It's an advanced type of epoxy resin vitrimer that's sturdy at room temperature but transforms under heat. What's more, it's been engineered to be less brittle and more dynamic, thanks to a molecule named polyrotaxane.
VPR can be chemically recycled with ease. Heat and a particular solvent disintegrate it down to its base components, ready for reuse. And if it ends up in the ocean, it's less of a villain than traditional plastics. After a month in seawater, VPR biodegraded by 25% and became a snack for sea creatures.
— Utilizing a system of biodiversity credits, akin to carbon credits, businesses and individuals can invest directly in the protection of vital habitats. Each credit represents a quantifiable piece of conserved land, with the assurance that no deforestation or harmful development will take place there. This mechanism translates economic activity into a force for conservation, offering a transparent and direct pathway for investors to contribute to the safeguarding of Costa Rica's biodiversity.
The technology underpinning this initiative is as revolutionary as the concept itself. Blockchain, a digital ledger known for its security and transparency, serves as the backbone for tracking and validating the sale and impact of biodiversity credits. This ensures that every transaction is recorded immutably, providing a clear trail from investment to conservation outcome. By applying smart contracts, the system automatically enforces the terms of conservation agreements, guaranteeing that funds are used as intended and that the protected land remains inviolate.
— Wyoming's Airloom Energy has come out of stealth mode with a new CEO fresh out of Google, US$4 million in seed funding, led by Bill Gates's Breakthrough Energy Ventures fund, and a radically different technical approach that it says fundamentally upends the financial equation for wind farms.
— Globally, up to 40% of land is now degraded. "The clothes we are wearing today are probably contributing to land degradation somewhere else." The data release comes ahead of a meeting of world leaders and experts in Samarkand, Uzbekistan, on 13 November to review global progress towards land degradation neutrality.
— We are teaching artificial intelligence to do in minutes what would take years for teams of engineers or even traditional computing to do — imagine, design, and test breakthrough green materials: batteries, airplanes, even concrete. "If we were to design these things using traditional methods, we would need an absurd amount of experiments."
— Satellite imagery is of such high resolution now that it can show where trees are likely to brush against power lines and spark a wildfire. That's too much imagery for humans to pore over, but not for computer-vision AI technologies.
— A web-based AI app that anyone with a smartphone and internet access can use evaluates images of blueberries to determine if they are bruised internally, which isn't easy for people to see (and it could be applied to other fruits).
— "Intelligent people disagree about whether fully-autonomous generative AI applications should ever be used in mental health care, primarily because of concerns about AI safety"
— In evaluating student work, algorithms had the accuracy at the level of a human, meaning they were just as accurate in identifying different components of an argument in an essay as an expert, human rater.
— Results of the study indicate that if global temperatures increase by 2C above pre-industrial levels, the 2.2 billion residents of Pakistan and India's Indus River Valley, the one billion people living in eastern China and the 800 million residents of sub-Saharan Africa will annually experience many hours of heat that surpass human tolerance.
— Some researchers at the Dome C site stripped down to shorts, while others removed their shirts to loll in the warmth. Generally, the temperatures in March on the east coast of Antarctica are around -54 degreesC, marking a transition into autumn on the continent.
— The assessment, which was published in the journal Science Advances and was based on 2,000 studies, assessment found that six out of nine "planetary boundaries" had been broken because of human-caused pollution and destruction of the natural world.
Two are judged to be close to being broken: air pollution and ocean acidification. The one boundary that is not threatened is atmospheric ozone, after action to phase out destructive chemicals in recent decades led to the ozone hole shrinking.
Several planetary boundaries were passed long ago. The boundary for biosphere integrity, which includes the healthy functioning of ecosystems, was broken in the late 19th century, the researchers said, as destruction of the natural world decimated wildlife. The same destruction, particularly the razing of forests, means the boundary for land use was broken last century.
Climate models have suggested the safe boundary for climate change was surpassed in the late 1980s. For freshwater, a new metric involving both water in lakes and rivers and in soil, showed this boundary was crossed in the early 20th century.
Another boundary is the flow of nitrogen and phosphorus in the environment. According to the UN Food and Agriculture Organization data, three times the safe level of nitrogen is added to fields every year.
The boundary for synthetic pollution, such as pesticides, plastics and nuclear waste, was shown to have been passed by a 2022 study.
— If the world reaches 2.7 degrees of warming — the estimated temperature increase based on climate pledges made at the Conference of Parties (COP26) of the UN Framework Convention for Climate Change — nearly all glaciers in Central Europe, western Canada, and the U.S. (including Alaska) will have melted. If warming reaches 4 degrees Celsius, 80% of the world's glaciers will disappear and contribute 15 centimeters (6 inches) of sea level rise.
— Plant diversity consistently attracts more abundant and diverse communities of predators. Herbivore diversity tends to increase in response to plant diversity treatments, while herbivore abundance and plant damage generally decrease. But specialist herbivores often respond negatively to plant diversity, while generalists more often mount positive or neutral responses.
— New research published in the journal Environmental Research Letters highlights widespread "opportunity hot spots" in the western United States for using proactive forest management, such as forest thinning, prescribed fire, and cultural burning, to reduce the risk of losing carbon to future wildfires.
— Backed by the G20, a set of standards released by the International Sustainability Standards Board (ISSB) will set worldwide sustainability reporting requirements for decades to come. The new requirements pave the way for companies across jurisdictions to disclose uniform climate and sustainability information.
It aligns with financial accounting practices in more than 140 countries and will help investors understand the sustainability-related risks and opportunities facing businesses. Singapore, Canada and the UK have already signalled that they are looking at routes to integrate the new standards.
— The Y chromosome, alongside the X chromosome, plays a complex role in sexual development and contributes to other aspects of human biology, such as cancer risk and severity.
The first human genome sequence was mapped in 2001. In 2022, an international group of scientists called the Telomere-to-Telomere Consortium announced that they were able to finally fill in the gaps of the human genome. Now they have published a paper of their findings. It is the last human chromosome to be fully sequenced.
Unlike most other chromosomes, the Y is made up of palindromes, or sequences that are the same forward and backward. These palindromes are long too — "roughly more than a million base pairs.
In a separate but related paper also published in Nature, researchers were able to sequence the Y chromosome from 43 different males across 21 world populations. This gives great insight into human genetic evolution —along with even more information to help with medical treatments and diagnostics.
— In the EU and the UK, unethical stem cell clinics are taking advantage of a regulatory loophole. If stem cells aren't modified in any way after they're extracted and then re-inserted into a person, these procedures fall outside the regulations for so-called advanced therapy medicinal products (medicines based on genes, tissues or cells). As a result of this lack of regulation, there is no standard quality control — if there is any quality control at all. Consequently, the effectiveness and safety of stem cell therapies cannot be guaranteed.
In the US, several patients lost their sight after receiving stem-cell treatment for degenerative eye conditions. The patients, who were treated at an unregulated stem-cell therapy clinic in Florida, paid up to US$20,000 (£15,600) to take part in the "clinical trial". Other reports have highlighted severe harms associated with unregulated stem cell treatments, including fever, infections, tumours, brain inflammation, life-threatening blood clots, disability and even death.
— If Switzerland is to meet its net-zero carbon emissions targets, it must sort out how to obtain sufficient green hydrogen, a gas that can be produced from renewable energies, the NZZ am Sonntag reports. Hydrogen is expected to replace the use of fossil fuels by industry and for the supply of electricity. They suggest in a letter, seen by news agency Keystone-SDA, that the country convert its existing transit pipeline to accommodate hydrogen.
— Four African countries accounted for just over half of all malaria deaths worldwide: Nigeria (31.3 per cent), Democratic Republic of Congo (12.6 per cent), Tanzania (4.1 per cent) and Niger (3.9 per cent).Instead, the beneficiaries are Malaria Vaccine Implementation Programme (MVIP) countries: Ghana, Kenya and Malawi, who will receive doses to continue vaccinations in pilot areas.
Gavi, the Vaccine Alliance, in a statement, said the distributions were determined through application of principles outlined in the framework for allocation of limited malaria vaccine supply, which prioritizes areas of highest need, where the risk of illness and death among children are highest.
— By "increasing the concentration of greenhouse gases, we are entering uncharted water where we are struggling to really have an accurate idea of what type of extremes we're going to face."
— UN High Commissioner for Human Rights Volker Türk told a UN Human Rights Council debate on the right to food that extreme weather events were wiping out crops, herds and ecosystems, making it impossible for communities to rebuild and support themselves. "More than 828 million people faced hunger in 2021. And climate change is projected to place up to 80 million more people at risk of hunger by the middle of this century," said Türk. "Our environment is burning. It's melting. It's flooding. It's depleting. It's drying. It's dying."
— The argument is often the same — the production of electric vehicles produced almost 70% more pollution than the production of traditional vehicles (that's a fact from Volvo, by the way). It's not incorrect, but it is heavily biased. A 2020 study by Transport and Environment found that the life cycle pollution output — or the overall pollution produced by an EV across its entire lifespan — is, on average, almost three times less than that of a vehicle that runs on gasoline. Aside from that, there is a lot of progress being made to mitigate the production pollution.
— A recent study published in Nature has identified DNA mutations in a gene that senses viral RNA as a cause of lupus, paving the way for the development of new treatments. This is the first time a TLR7 mutation has been shown to cause lupus, providing clear evidence of one way this disease can arise.
— The settlement is the largest related to water safety in U.S. history. The company said the settlement would provide the funds over a 13-year period to cities, towns and other public water systems to test for and treat contamination from per- and polyfluoroalkyl substances, or PFAS.
— If the goal of mediating research is to have a societal impact, then it seems that we are pushing all the buttons that don't work. An analysis of the collection of about 50,000 scientific publications on climate change for the year 2020 showed that that most of the research selected by the media overly focused on large-scale climate projections that will occur in the future, and a narrow range of threats such as polar bears, drought and melting glaciers.
— Phosphorus in the form of phosphates is vital for all life on Earth. It is essential for the creation of DNA and RNA, energy-carrying molecules, cell membranes, bones and teeth in people and animals, and even the sea's microbiome of plankton. Life as we know it is simply not possible without phosphates.
"We found phosphate concentrations at least 100 times higher in the moon's plume-forming ocean waters than in Earth's oceans," Dr. Christopher Glein said. "Using a model to predict the presence of phosphate is one thing, but actually finding the evidence for phosphate is incredibly exciting. This is a stunning result for astrobiology and a major step forward in the search for life beyond Earth."
— Our newly published research suggests warming of more than 1° risks sea level rise of multiple metres, more intense hurricanes and more frequent weather extremes.
— The molecular remains of a microbe called protosterol biota appeared within the Barney Creek Formation in Australia's Northern Territory.
— The oldest song to have survived in its entirety is a first-century A.D. Greek tune known as the "Seikilos Epitaph." The song, the melody of which is recorded, alongside its lyrics, in the ancient Greek musical notation, was found in 1883 engraved on a pillar (a stele) from the Hellenistic town of Tralles near present-day Aydin, Turkey, not far from Ephesus.
— Astronomers have spotted white dwarfs moving faster than any free-moving star seen before — so fast they must have been launched by supernovae
— Certain parts of the city imposed a height limit for new buildings of 37 metres in 1977 after the construction of the controversial 209m-tall Montparnasse Tower, which was completed in 1973. That monolithic building has long been criticised by some Parisians for looking out of place — a blot on the iconic landscape.
Paris has now effectively, returned to 1977 — the ban reintroduced as part of mayor Anne Hidalgo's aim to reduce Paris' carbon emissions, otherwise known as the Local Bioclimatic Urban Plan. Another reason behind the decision lies in the controversial construction of the Tour Triangle tower designed by Swiss studio Herzog & de Meuron. Starting building works in 2021, the pyramid-shaped tower is scheduled for completion in 2026 but has been dogged by backlash and delayed by a staggering 12 years due to various legal and planning battles. At its completion, the Tour Triangle will be the city's third tallest building, playing host to a hotel and office as well as shops and restaurants. The building is in a trapezoidal form, meaning it will resemble a thin tower from central Paris, but from the east and west of the city, its full width will be visible.
— Large companies are either more likely to contribute to extreme levels of warming or are not disclosing their greenhouse gas emissions at all, according to a new report from ESG Book, seen by CNN. The efforts of just 22% of the world's 500 biggest public companies by market value are aligned with the Paris Agreement. Almost half, or 45%, of companies are aligned with warming of at least 2.7 degrees Celsius — a disastrous level of warming. That's down from 61% in 2018.
— The last time a strong El Nino was in full swing, in 2016, the world saw its hottest year on record. Meteorologists expect that this El Nino, coupled with excess warming from climate change, will see the world grapple with record-high temperatures. Experts are also concerned about what is going on in the ocean. An El Nino means that waters in the Eastern Pacific are warmer than usual. But even before this El Nino began, in May, the average global sea surface temperature was about 0.1C (0.2F) higher than any other on record. That could supercharge extreme weather.
— The last time the federal government had a balanced budget — when revenue exceeded spending — was in 2000, under the Clinton Administration. The first U.S. president to increase the national debt by over a trillion dollars during his time in office was Ronald Reagan. In dollar terms, the national debt increased the most under President Barack Obama and President Donald Trump, who oversaw increases of $8.3 trillion and $8.2 trillion, respectively, during their time in office.
— Algorithm performs more efficiently and effectively than current methods, according to a study
— The ocean gateways in the Canadian Arctic Archipelago served as a vital linchpin, determining whether ice sheets could form or not. The simulations indicated that as long as the ocean gateways in the Canadian Arctic Archipelago were open, the Northern Hemisphere's cooling due to Earth's orbital configuration allowed ice sheets to develop in Northern Canada and Siberia, but not in Scandinavia. The scientists conducted a second study where they created a simulation to investigate the impact of marine ice sheets blocking the waterways in the Canadian Arctic Archipelago. The diversion caused the North Atlantic deep circulation to weaken and freshen, leading to the expansion of sea ice and cooler conditions in Scandinavia. The simulation results indicated that this scenario was adequate to initiate the growth of ice in Scandinavia. Sediment records also demonstrated strong indications of a weakened deep ocean circulation before the formation of glaciers in Scandinavia, which closely mirrored the results obtained from the simulation.
The study proposes that even minor disturbances in the Earth's climate system could result in substantial and abrupt changes in ice sheet size and distribution, with far-reaching effects on sea level increase, ocean currents, and global climate patterns.
— They identified a previously unknown system within the motor cortex manifested in multiple nodes that are located in between areas of the brain already known to be responsible for movement of specific body parts — hands, feet and face — and are engaged when many different body movements are performed together.
The researchers called this system the somato-cognitive action network, or SCAN, and documented its connections to brain regions known to help set goals and plan actions.
This network also was found to correspond with brain regions that, as shown in studies involving monkeys, are connected to internal organs including the stomach and adrenal glands, allowing these organs to change activity levels in anticipation of performing a certain action. That may explain physical responses like sweating or increased heart rate caused by merely pondering a difficult future task, they said.
"Basically, we now have shown that the human motor system is not unitary. Instead, we believe there are two separate systems that control movement," said radiology professor Evan Gordon of the Washington University School of Medicine in St. Louis, lead author of the study published in the journal Nature.
"One is for isolated movement of your hands, feet and face. This system is important, for example, for writing or speaking — movements that need to involve only the one body part. A second system, the SCAN, is more important for integrated, whole body movements, and is more connected to high–level planning regions of your brain," Gordon said.
— The push started in a law school classroom in Fiji four years ago, according to Cynthia Houniuhi, president of Pacific Islands Students Fighting Climate Change. She and her international environmental law classmates brainstormed ways to seek action through various legal mechanisms, Houniuhi told reporters on a press call on 23 March. Propelled by youth activism, the effort to gain adoption by the UN General Assembly has been led by the Vanuatu government since 2021. The resolution, with a vote expected on March 29, has over 100 co-sponsors.
— "Even in the front room facing the explosion, one can be safe from the high airspeeds if positioned at the corners of the wall facing the blast. The team did not look at what would happen if you tried to survive a nuclear blast by hiding inside a fridge, a la Indiana Jones, though other scientists have cast doubt on that particular piece of movie logic."
— The key to the ancient concrete's durability was one ingredient: pozzolanic material, such as volcanic ash from the area of Pozzuoli, on the Bay of Naples. Ancient samples contain small, distinctive, millimeter-scale bright white mineral features. They were common component of Roman concretes. The white chunks — often called "lime clasts" — come from lime, another key ingredient in ancient concrete mix. Although previous studies have disregarded these features as a sign of sloppy mixing practices, or poor-quality raw materials, the new study theorizes that the tiny lime clasts gave the concrete its self-healing capability. Studying samples of the ancient concrete, MIT researchers determined that the white substances were made out of various forms of calcium carbonate. Further analysis provided clues that they had been formed by extreme temperatures. This would be the expected result of an exothermic reaction produced by using quicklime instead of the slaked lime in the concrete mixture. The research team now believes that "hot mixing" was the real key to the concrete's super-durable nature.
— a study identifies mutations that transform seemingly useless DNA sequences into potential genes by endowing their encoded RNA with the skill to escape the cell nucleus — a critical step toward becoming translated into a protein. The study's authors highlight 74 human protein genes that appear to have arisen in this de novo way — more than half of which emerged after the human lineage branched off from chimpanzees. Some of these newcomer genes may have played a role in the evolution of our relatively large and complex brains. When added to mice, one made the rodent brains grow bigger and more humanlike, the authors report this week in Nature Ecology & Evolution.