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Category: Biology

The nature you see in documentaries is beautiful and false

The nature you see in documentaries is beautiful and false

Emma Marris writes: It’s late afternoon, late pandemic, and I’m watching a new nature documentary in bed, after taking the daintiest of hits from a weed pen. The show is called A Perfect Planet, and it is narrated by Sir David Attenborough. I am looking at the red eye of a flamingo, a molten lake surrounding a tiny black pupil. Now I am looking at drone footage of a massive colony of flamingos, the classic sweeping overhead shot, what my…

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Many viruses can infect humans without making us sick

Many viruses can infect humans without making us sick

Sarah Zhang writes: One of the most perplexing and enduring mysteries of the pandemic is also one of the most fundamental questions about viruses. How can the same virus that kills so many go entirely unnoticed in others? The mystery is hardly unique to COVID-19. SARS, MERS, influenza, Ebola, dengue, yellow fever, chikungunya, West Nile, Lassa, Japanese encephalitis, Epstein-Barr, and polio can all be deadly in one person but asymptomatic in the next. But for most of human existence, we…

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To be fully human we must also be fully embodied animal

To be fully human we must also be fully embodied animal

Melanie Challenger writes: When I visited my grandmother at the undertakers, an hour or so before her funeral, I was struck by how different death is from sleep. A sleeping individual shimmers with fractional movements. The dead seem to rest in paused animation, so still they look smaller than in life. It’s almost impossible not to feel as if something very like the soul is no longer present. Yet my grandmother had also died with Alzheimer’s. Even in life, something…

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Scientists think play is valuable, but they’re not quite sure why

Scientists think play is valuable, but they’re not quite sure why

By Chris Woolston Anyone who has ever chucked a tennis ball in the general vicinity of a border collie knows that some animals take play very seriously. The intense stare, the tremble of anticipation, the apparent joy with every bounce, all in pursuit of inedible prey that tastes like the backyard. Dogs are far from the only animals that devote considerable time and energy to play. Juvenile wasps wrestle with hive mates, otters toss rocks between their paws, and human…

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Five ways fungi could change the world, from cleaning water to breaking down plastics

Five ways fungi could change the world, from cleaning water to breaking down plastics

Shutterstock By Mitchell P. Jones, Vienna University of Technology Fungi — a scientific goldmine? Well, that’s what a review published today in the journal Trends in Biotechnology indicates. You may think mushrooms are a long chalk from the caped crusaders of sustainability. But think again. Many of us have heard of fungi’s role in creating more sustainable leather substitutes. Amadou vegan leather crafted from fungal-fruiting bodies has been around for some 5,000 years. More recently, mycelium leather substitutes have taken…

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Africa’s forest elephants are just a step from extinction

Africa’s forest elephants are just a step from extinction

The New York Times reports: While some African elephants parade across the savanna and thrill tourists on safari, others are more discreet. They stay hidden in the forests, eating fruit. “You feel pretty lucky when you catch sight of them,” said Kathleen Gobush, a Seattle-based conservation biologist and member of the African Elephant Specialist Group within the International Union for Conservation of Nature, or I.U.C.N. The threat of extinction has diminished the odds of spotting one of these wood-dwelling elephants…

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Two bonobos adopted infants outside their group, marking a first for great apes

Two bonobos adopted infants outside their group, marking a first for great apes

Science News reports: Attentive parenting appears across the animal world, but adoption is rarer, especially when youngsters taken in aren’t kin. Now researchers have witnessed bonobos adopting infants from outside of their own communities. Two females, each from a different bonobo group, in the Luo Scientific Reserve in Congo took charge of orphans — grooming them, carrying them and providing food for at least a year. Two instances of adopted outsiders are known in other nonhuman primates, but this is…

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A critically endangered bird is losing its song

A critically endangered bird is losing its song

Brisbane Times reports: When Michael Alfa was setting up to photograph wildlife at Woolgoolga’s sewage works near the northern NSW town of Coffs Harbour last year, the avid birdwatcher could hardly believe his senses. There, among the warbling wattlebirds hanging off a coastal banksia tree, was a lone, critically endangered regent honeyeater, distinctive in its yellow and black plumage. But not its birdsong. “It was making the exact same song [as the wattlebirds]. If you hadn’t seen it, you wouldn’t…

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Nature knows how to avoid network collapse

Nature knows how to avoid network collapse

Ruth DeFries writes: Sometime in the first billion years of the planet’s 4.5-billion-year history, a cell emerged in a primordial stew of chemicals brewing in liquid water. At that moment, the predictable chemistry and physics of the early Earth gave way to seething, roiling complexity. Primitive life thrived in the deep sea, where underwater volcanoes vented heat and spilled a cocktail of chemicals into seawater. Once life was underway, the course of the planet and the life it supported became…

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The link between bioelectricity and consciousness

The link between bioelectricity and consciousness

Tam Hunt writes: Life seems to be tied to bioelectricity at every level. The late electrophysiologist and surgeon Robert Becker spent decades researching the role of the body’s electric fields in development, wound healing, and limb regrowth. His 1985 book, The Body Electric: Electromagnetism and the Foundation of Life, was a fascinating deep dive into how the body is electric through and through—despite our inability to see or sense these fields with our unaided senses. But Becker’s work was far…

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What is life? Its vast diversity defies easy definition

What is life? Its vast diversity defies easy definition

Carl Zimmer writes: “It is commonly said,” the scientists Frances Westall and André Brack wrote in 2018, “that there are as many definitions of life as there are people trying to define it.” As an observer of science and of scientists, I find this behavior strange. It is as if astronomers kept coming up with new ways to define stars. I once asked Radu Popa, a microbiologist who started collecting definitions of life in the early 2000s, what he thought…

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Brood X cicadas are about to put on one of the wildest shows in nature. And D.C. is the main stage

Brood X cicadas are about to put on one of the wildest shows in nature. And D.C. is the main stage

The Washington Post reports: They’ve been buried — alive — for 17 years. And now, Brood X, one of the world’s largest swarms of giant fly-like bugs called cicadas, is ready to rise. When the ground warms to 64 degrees, they’ll stop gnawing on tree roots and start scratching toward the surface by the hundreds of billions. Georgia and other Southern states will probably be where they first emerge around the end of March, experts say. But residents of the…

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Martin Luther rewired your brain

Martin Luther rewired your brain

Joseph Henrich writes: Your brain has been altered, neurologically re-wired as you acquired a particular skill. This renovation has left you with a specialized area in your left ventral occipital temporal region, shifted facial recognition into your right hemisphere, reduced your inclination toward holistic visual processing, increased your verbal memory, and thickened your corpus callosum, which is the information highway that connects the left and right hemispheres of your brain. What accounts for these neurological and psychological changes? You are…

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Plant cells of different species can swap organelles

Plant cells of different species can swap organelles

Viviane Callier writes: More than a decade ago, plant geneticists noticed something peculiar when they looked at grafted plants. Where two plants grew together, the cells of each plant showed signs of having picked up substantial amounts of DNA from the other one. In itself, that wasn’t unprecedented, because horizontal transfers of genes are not uncommon in bacteria and even in animals, fungi and plants. But in this case, the transferred DNA seemed to be the entire intact genomes of…

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Insect populations suffering death by 1,000 cuts, say scientists

Insect populations suffering death by 1,000 cuts, say scientists

The Guardian reports: Insect populations are suffering “death by a thousand cuts”, with many falling at “frightening” rates that are “tearing apart the tapestry of life”, according to scientists behind a new volume of studies. The insects face multiple, overlapping threats including the destruction of wild habitats for farming, urbanisation, pesticides and light pollution. Population collapses have been recorded in places where human activities dominate, such as in Germany, but there is little data from outside Europe and North America…

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