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UNBELIEVABLE: 35 - The Untold Story

AI analysis of 100 hours of real conversations — and the brain activity underpinning them — reveals how humans understand language

An AI model trained on dozens of hours of real-world conversation accurately predicts human brain activity and shows that features of language structure emerge without being coded in.

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Do sperm really race to the egg?

It's commonly thought that sperm "race" to the egg, with the winner fertilizing it. But is this really the case?

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Why is it still so hard to make nuclear weapons?

Scientists have been building nuclear weapons for more than 80 years, but crafting this technology remains a challenge.

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Science news this week: Blood moon and a mysterious mummy

March 15, 2025: Our weekly roundup of the latest science in the news, as well as a few fascinating articles to keep you entertained over the weekend.

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Refuge from the worst mass extinction in Earth's history discovered fossilized in China

The End-Permian mass extinction killed an estimated 80% of life on Earth, but new research suggests that plants might have done okay.

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How do fitness trackers measure your heart rate?

Everything you need to know about photoplethysmography (PPG), the technology behind heart rate measurements in fitness watches and smart rings.

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'The most shameful form of execution': Han warriors found dismembered in 2,100-year-old mass grave in Mongolia

Genetic analysis of skeletons in a mass grave in Mongolia has revealed they were soldiers in the Han-Xiongnu Wars more than two millennia ago.

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People find AI more compassionate than mental health experts, study finds. What could this mean for future counseling?

People find AI more compassionate and understanding than human mental health experts, a new study shows. Even when participants knew that they were talking to a human or AI, the third-party assessors rated AI responses higher.

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Neanderthals, modern humans and a mysterious human lineage mingled in caves in ancient Israel, study finds

A newly excavated cave in Israel holds burials and artifacts suggesting that multiple human species commingled and shared ideas there during the Paleolithic.

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How does rowing affect your heart, and is it different to running?

Rowing machines and treadmills do not challenge your cardiovascular system in the same way, so what is the science behind it?

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Epigenetic 'scars' on the genome can be passed down by grandmothers, study finds

In a story of collaboration and community, researchers identified intergenerational epigenetic changes caused by war and trauma in Syrian refugees.

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Most ancient Europeans had dark skin, eyes and hair up until 3,000 years ago, new research finds

A new study charts the genetics of skin, hair and eye color in Europe over 45,000 years.

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Quantum-inspired storage can store 100s of terabytes of data on a tiny crystal — with plans to make them into much larger discs

Scientists have found a way to store hundreds of terabytes of data onto a tiny crystal, with plans to scale this up to a disc-sized device that can be compatible with modern computing.

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A giant extraterrestrial 'wave' hit Earth 14 million years ago — and may have dramatically altered our planet's climate

Our solar system's journey around the center of the Milky Way takes it through varying galactic environments, and one may have had a lasting impact on Earth's climate, according to a new study.

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We may finally understand how metformin lowers blood sugar, animal study finds

The common diabetes drug metformin works partly by excreting sugar from the bloodstream into the intestines, where gut bacteria then convert it into chemicals that improve the insulin response.

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Megalodon may have grown up to 80 feet long — far larger than previous estimates

New study suggests megalodons may have grown 15 feet longer than some previous estimates, had enormous babies, and didn't look like supersized great white sharks.

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Was medieval armor bulletproof?

The metal suits worn by knights during the Middle Ages were originally designed to protect against weapons such as swords. But could medieval armor also stop bullets?

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Science at a crossroads: Dispatches from Friday's 'Stand Up for Science' rallies across the US

Our science journalists reported on the Stand Up for Science rallies held in New York City and Raleigh, North Carolina.

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28,000-year-old Neanderthal-and-human 'Lapedo child' lived tens of thousands of years after our closest relatives went extinct

Researchers used a novel method of radiocarbon dating to figure out the age of the Lapedo child, who had both Neanderthal and human traits.

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Is there really a difference between male and female brains? Emerging science is revealing the answer.

Brain scans, postmortem dissections, artificial intelligence and lab mice reveal differences in the brain that are linked to sex. Do we know what they mean?

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'Let's just study males and keep it simple': How excluding female animals from research held neuroscience back, and could do so again

Neuroscience research has only recently begun to prioritize the inclusion of both male and female lab animals in studies. Could we see that shift reverse?

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Powerful 'equinox auroras' may arrive soon: Why changing seasons can bring the best northern lights

Expect an uptick in aurora sightings near the spring equinox on March 20, as celestial geometry swings in favor of geomagnetic disturbances.

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'Mini placentas' in a dish reveal key gene for pregnancy

Different versions of a gene called ACE2 affect how well the placenta grows during pregnancy, a laboratory study finds.

LiveScience

Unproven Einstein theory of 'gravitational memory' may be real after all, new study hints

Einstein's theory of general relativity suggests that the "memory" of ancient events, such as black hole mergers, may be etched into the fabric of space-time by gravitational waves. New research shows how this theory of gravitational memory could finally be proven.

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2,600-year-old jewelry stash from ancient Egypt includes gold statuette depicting family of gods

Archaeologists have found a hoard of 2,600-year-old jewelry at Karnak Temple in Egypt.

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