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FORGOTTEN HISTORY: 5 | History Defined

The biggest trees in the Peruvian Amazon store the most carbon — and they also face the greatest threat from humans

The Amazon's biggest trees store disproportionately more carbon than smaller trees do, new study finds. But in the Peruvian Amazon, large trees are currently prioritized for harvest.

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Research group claims preeclampsia doomed the Neanderthals, but experts say it's just a 'thought experiment'

Preeclampsia, a complication of pregnancy that involves high blood pressure, could have led to a decline in Neanderthals' fertility, a new study suggests.

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Sleep deprivation harms the gut via the vagus nerve, early study reveals

New research reveals that sleep deprivation sends aberrant signals through the vagus nerve, triggering a serotonin surge that can kill gut stem cells.

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Vanishing lakes in Tibet may have triggered earthquakes by awakening faults in Earth's crust

Shrinking lakes in Tibet likely woke up long-dormant tectonic faults, a new study finds. The findings strengthen the link between climate change and earthquakes

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Snakes keep evolving into cannibals — here's what scientists think is going on

A review of over 500 reports of cannibalistic behavior in snakes finds it's appeared multiple times in different evolutionary lineages, leading researchers to hypothesize it's beneficial for snakes under certain circumstances.

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How long do most planets last?

Planets are born, and they can also "die." So what's the lifespan of a typical planet?

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'Impossible' mantle earthquakes actually occur all over the world, study finds

Researchers were once unsure whether mantle earthquakes existed. Now they have a global map of this mysterious phenomenon.

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What are ghost lineages, remnants of the past that still exist in our DNA today?

Ghost lineages reveal themselves through ancient genes that still exist in living beings today.

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Did modern humans wipe out the Neanderthals? New evidence may finally provide answers.

A complex picture of how Neanderthals died out, and the role that modern humans played in their disappearance, is emerging.

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Record-breaking gravitational wave puts Einstein's relativity to its toughest test yet — and proves him right again

A record-breaking gravitational wave signal let scientists "listen" to a distant black hole merger and put Einstein's gravity to its toughest test yet.

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Canada could remove 5 times its annual carbon emissions by planting trees on edge of boreal forest, study finds

Planting trees on 6.4 million hectares of northern taiga forest could remove 3.9 gigatons of CO2 by 2100 — five times Canada's annual emissions.

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Archaeopteryx, one of the world's first proto birds, has a set of weird, never-before-seen features, new study reveals

Iconic transition species between dinosaurs and birds may have had weird 'teeth' on roof of its mouth and a highly mobile tongue, study reveals

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China banned all fishing to save the Yangtze River. This 'nuclear' option appears to be working.

Decades of overfishing and habitat degradation led to huge declines in freshwater biodiversity in China's longest river, but there are signs of recovery after a fishing ban was implemented in 2021.

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Risk of death from pregnancy in the US is 44 times higher than that from abortion, new analysis reveals

A figure commonly used to compare the risk of death from pregnancy compared with the risk of death from abortion might be based on outdated data, a new study suggests.

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'DNA origami' could be key for making an effective HIV vaccine, early study hints

A new vaccine design uses folded DNA to steer the immune system toward producing the rare immune cells needed to make protective antibodies against HIV.

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Needle-free insulin? Scientists invent gel that delivers insulin through the skin in animal studies

A new polymer gel can deliver insulin through intact skin in animal tests. It could someday offer a path toward needle-free diabetes treatment, some say.

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Only certain types of brain-training exercises reduce dementia risk, large trial reveals

A large, 20-year trial showed that speedy cognitive exercises could reduce the risk of Alzheimer's disease and other types of dementia. The question is, could these tasks be adapted into video games?

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'Night owls' may have worse heart health — but why?

Emerging evidence suggests that "night owls" are more likely to have poor heart health and a higher risk of heart attack or stroke than "morning larks." Why is that?

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Did ancient Greeks let women compete in the Olympics?

The ancient Olympic games were crowded with male athletes, but were there opportunities for females to compete in sports?

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'There's no reason to ban us from playing': Analysis debunks notion that transgender women have inherent physical advantages in sports

A meta-analysis of 52 studies that included over 5,000 transgender people suggests that transgender women's physical fitness after hormone therapy is comparable to that of cisgender women.

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Psychedelic drug ayahuasca could treat PTSD, early studies hint. But exactly how it works isn't clear.

Using methods such as brain scans and symptom tracking, scientists are beginning to study whether a complex psychedelic brew known as ayahuasca can help rewire the brain's response to trauma.

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Psychedelics may rewire the brain to treat PTSD. Scientists are finally beginning to understand how.

New research shows MDMA and psilocybin may restore neural flexibility in people with PTSD, thereby helping the brain unlearn fear and relearn safety.

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Every major galaxy is speeding away from the Milky Way, except one — and we finally know why

A vast, flat sheet of dark matter may solve the long-standing mystery of why our neighboring galaxy Andromeda is speeding toward us while our other neighbors are moving away from us.

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The 'mono' virus raises the risk of MS and cancer in some. 22 genes hint at why.

An infection with Epstein-Barr virus is a nonevent for most people. But for a subset, the virus can contribute to chronic conditions and cancer, and genes may play a role in that risk.

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Spotted lanternflies are invading the US. They may have gotten their evolutionary superpowers in China's cities.

The alarming spread of spotted lanternflies across the U.S. has been made possible by cities acting as evolutionary incubators, fine-tuning the insects and enabling them to thrive.

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