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Category: Biology

The key to a healthy gut microbiome is a healthy diet

The key to a healthy gut microbiome is a healthy diet

Università di Trento: A varied diet rich in vegetables is known to be healthy for one’s well-being. Excessive consumption of meat, especially red meat, can lead to chronic and cardiovascular diseases. That is also because what we eat shapes the gut microbiome. At the same time, excluding certain foods, such as dairy or animal products, is not necessarily a general solution to achieve microbial balance. But can we find out which food products determine differences in the gut microbiome? Starting…

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We all carrying thousands of genetic mistakes accrued over a lifetime

We all carrying thousands of genetic mistakes accrued over a lifetime

Amber Dance writes: You began when egg and sperm met, and the DNA from your biological parents teamed up. Your first cell began copying its newly melded genome and dividing to build a body. And almost immediately, genetic mistakes started to accrue. “That process of accumulating errors across your genome goes on throughout life,” says Phil H. Jones, a cancer biologist at the Wellcome Sanger Institute in Hinxton, England. Scientists have long known that DNA-copying systems make the occasional blunder…

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The ocean is teeming with networks of interconnected bacteria

The ocean is teeming with networks of interconnected bacteria

Veronique Greenwood writes: Prochlorococcus bacteria are so small that you’d have to line up around a thousand of them to match the thickness of a human thumbnail. The ocean seethes with them: The microbes are likely the most abundant photosynthetic organism on the planet, and they create a significant portion — 10% to 20% — of the atmosphere’s oxygen. That means that life on Earth depends on the roughly 3 octillion (or 3 × 1027) tiny individual cells toiling away….

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Scientists re-create the microbial dance that sparked complex life

Scientists re-create the microbial dance that sparked complex life

Molly Herring writes: Far from being solo operators, most single-celled microbes are in complex relationships. In the ocean, the soil and your gut, they might battle and eat each other, exchange DNA, compete for nutrients, or feed on one another’s by-products. Sometimes they get even more intimate: One cell might slip inside another and make itself comfortable. If the conditions are just right, it might stay and be welcomed, sparking a relationship that could last for generations — or billions…

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The extraordinary memories of food-caching birds

The extraordinary memories of food-caching birds

Matthew Hutson writes: A while ago, I searched for a beard trimmer in my bedroom. I spent probably forty-five minutes looking in every likely location at least twice, and every unlikely location at least once. I swore up a storm; the trimmer never turned up. I’ve played similar games with pants. There’s a reason for the burgeoning market in electronic tags that track your belongings. Our poor memories can seem mystifying, especially when you consider animals. This time of year,…

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The communication we share with apes

The communication we share with apes

Anthony King writes: There are few one-offs in life on Earth—rarely can a single species boast a trait or ability that no other possesses. But human language is one such oddity. Our ability to use subtle combinations of sounds produced by our vocal cords to create words and sentences, which when combined with grammatical rules, convey complex ideas. There were attempts in the 1950s to teach chimpanzees to “speak” some words, but these failed. And with no other living relatives…

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The race to translate animal communication into human language

The race to translate animal communication into human language

Arik Kershenbaum writes: In 2025 we will see AI and machine learning leveraged to make real progress in understanding animal communication, answering a question that has puzzled humans as long as we have existed: “What are animals saying to each other?” The recent Coller-Dolittle Prize, offering cash prizes up to half-a-million dollars for scientists who “crack the code” is an indication of a bullish confidence that recent technological developments in machine learning and large language models (LLMs) are placing this…

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Extraterrestrial life may look nothing like life on Earth − so astrobiologists are coming up with a framework to study how complex systems evolve

Extraterrestrial life may look nothing like life on Earth − so astrobiologists are coming up with a framework to study how complex systems evolve

Evolution, the process of change, governs life on Earth − and potentially different forms of life in other places. Just_Super/E+ via Getty Images By Chris Impey, University of Arizona We have only one example of biology forming in the universe – life on Earth. But what if life can form in other ways? How do you look for alien life when you don’t know what alien life might look like? These questions are preoccupying astrobiologists, who are scientists who look…

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‘Unprecedented risk’ to life on Earth: Scientists call for halt on ‘mirror life’ microbe research

‘Unprecedented risk’ to life on Earth: Scientists call for halt on ‘mirror life’ microbe research

The Guardian reports: World-leading scientists have called for a halt on research to create “mirror life” microbes amid concerns that the synthetic organisms would present an “unprecedented risk” to life on Earth. The international group of Nobel laureates and other experts warn that mirror bacteria, constructed from mirror images of molecules found in nature, could become established in the environment and slip past the immune defences of natural organisms, putting humans, animals and plants at risk of lethal infections. Although…

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Fish have a brain microbiome. Could humans have one too?

Fish have a brain microbiome. Could humans have one too?

Yasemin Saplakoglu writes: Bacteria are in, around and all over us. They thrive in almost every corner of the planet, from deep-sea hydrothermal vents to high up in the clouds, to the crevices of your ears, mouth, nose and gut. But scientists have long assumed that bacteria can’t survive in the human brain. The powerful blood-brain barrier, the thinking goes, keeps the organ mostly free from outside invaders. But are we sure that a healthy human brain doesn’t have a…

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Hiker discovers first trace of entire prehistoric ecosystem in Italian Alps

Hiker discovers first trace of entire prehistoric ecosystem in Italian Alps

The Guardian reports: A hiker in the northern Italian Alps has stumbled across the first trace of what scientists believe to be an entire prehistoric ecosystem, including the well-preserved footprints of reptiles and amphibians, brought to light by the melting of snow and ice induced by the climate crisis. The discovery in the Valtellina Orobie mountain range in Lombardy dates back 280 million years to the Permian period, the age immediately prior to dinosaurs, scientists say. Claudia Steffensen, from Lovero,…

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The cosmos teems with complex organic molecules

The cosmos teems with complex organic molecules

Elise Cutts writes: Ten years ago, the European Space Agency’s Rosetta probe pulled up alongside a dusty, icy lump the size of a mountain. The probe would follow its quarry, a comet called 67P/Churyumov-Gerasimenko, for two years as onboard instruments caught and analyzed the dust and gas streaming away from the comet. Scientists sought hints about how our solar system came to be — and about the origin of one class of molecules in particular. Organic molecules — compounds containing…

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The U.S. could soon face a threat ‘more powerful’ than nuclear weapons

The U.S. could soon face a threat ‘more powerful’ than nuclear weapons

Ashish K. Jha, Matt Pottinger and Matthew McKnight write: President Richard M. Nixon’s bold 1969 decision to renounce biological weapons and spearhead a treaty to ban them helped contain the threat of a man-made pandemic for half a century. But our inheritance from Nixon is now fading. And in this age of synthetic biology, unless we act quickly to deter our adversaries from making and using bioweapons, we could face disaster in the near future. The nightmare of a biological…

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A new field theory reveals the hidden forces that guide us

A new field theory reveals the hidden forces that guide us

Daniel W McShea and Gunnar O Babcock write: Why do rocks fall? Before Isaac Newton introduced his revolutionary law of gravity in 1687, many natural scientists and philosophers thought that rocks fell because falling was an essential part of their nature. For Aristotle, seeking the ground was an intrinsic property of rocks. The same principle, he argued, also explained why things like acorns grew into oak trees. According to this explanation, every physical object in the Universe, from rocks to…

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Propelled by tech money, the menace of race science is back – and it’s just as nonsensical as ever

Propelled by tech money, the menace of race science is back – and it’s just as nonsensical as ever

Adam Rutherford writes: “Civilisation is going to pieces … if we don’t look out the white race will be – will be utterly submerged. It’s all scientific stuff; it’s been proved.” Sentiments like this will be familiar to those who lurk in the less wholesome corners of the internet, where racism and other bigotries flourish. As a geneticist who specialises in racism and eugenics, I lurk so that you don’t have to. However, this particular phantom threat comes from Tom…

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In the authoritarians’ new war on ideas, biology might be next

In the authoritarians’ new war on ideas, biology might be next

By C. Brandon Ogbunu In 2021, U.S. Sen.Ted Cruz compared critical race theory — an academic subfield that examines the role of racism in American institutions, laws, and policies — to the Ku Klux Klan, the most notorious homegrown terrorist organization in U.S. history. In doing so, he opened a playbook that resembles one put into practice by Florida Gov. Ron DeSantis and others: Attack ideas that are unfriendly to a narrow view of the world, and do so by…

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