This crocodile ran like a greyhound across prehistoric Britain 200 million years ago

A newly discovered Triassic reptile from the UK looked more like a racing greyhound than a crocodile, built for speed on land. With long legs and a lightweight body, it hunted small animals in a dry, upland environment millions of years ago. Scientists identified it as a new species after spotting key differences in its fossils. It’s also a tribute to an inspiring teacher who helped spark a future scientist’s curiosity.

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Tectonic shift: Earth was already moving 3.5 billion years ago

Scientists have uncovered the oldest direct evidence yet that Earth’s tectonic plates were on the move 3.5 billion years ago. By analyzing magnetic fingerprints in ancient rocks, they reconstructed how parts of the planet slowly drifted and even rotated over time. This challenges long-standing ideas that early Earth may have had a rigid, unmoving surface. Instead, it suggests the planet was already dynamic—and possibly setting the stage for life—much earlier than expected.

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Scientists turn probiotic bacteria into tumor-hunting cancer killers

Scientists have engineered probiotic bacteria to act as tumor-seeking drug factories. In mice, these bacteria infiltrated tumors and produced a cancer-fighting drug right where it was needed. This targeted approach could make treatments more effective and reduce side effects. More research is needed before it can be tested in people.

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Men are losing a key chromosome with age and it may be deadly

Aging men often lose the Y chromosome in a growing number of their cells—and it may be far more dangerous than once believed. This loss has been linked to heart disease, cancer, Alzheimer’s, and shorter lifespans. Researchers suspect Y-less cells may grow faster and disrupt normal body functions. What seemed like a minor genetic quirk could actually be a major driver of age-related disease.

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Astronomers discover nearby galaxy was shattered by cosmic crash

A nearby galaxy is behaving strangely—and now scientists know why. The Small Magellanic Cloud’s stars move in chaotic patterns because it slammed into its larger neighbor millions of years ago. That collision disrupted its structure and even created the illusion that its gas was rotating. The discovery means this once “textbook” galaxy may not be as typical as astronomers believed.

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What happens after Ozempic shocked researchers

Stopping popular weight-loss injections like Ozempic or Mounjaro might not trigger the dramatic rebound many fear. A large real-world study of nearly 8,000 patients found that most people who discontinue these drugs manage to keep the weight off—or even continue losing—by restarting treatment, switching medications, or adopting lifestyle changes. While earlier clinical trials suggested rapid weight regain, this new evidence paints a more hopeful picture.

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Scientists thought ravens followed wolves. They were wrong

Ravens have long been thought to follow wolves to find food, but new research shows they’re far more strategic. By tracking both animals in Yellowstone, scientists discovered that ravens memorize areas where wolf kills are likely and fly directly to those spots—sometimes from great distances. Rather than trailing wolves, they rely on learned patterns in the landscape. It’s a clever system that highlights just how intelligent these birds really are.

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Scientists discover tiny rocket engines inside malaria parasites

Malaria parasites contain tiny spinning crystals that have puzzled scientists for years. New research reveals they’re powered by a rocket-like reaction that breaks down hydrogen peroxide, releasing energy. This motion may help the parasite detoxify harmful chemicals and manage iron more efficiently. The discovery could lead to new drugs and spark innovations in microscopic robotics.

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The surprising cancer link between cats and humans

Scientists have mapped the genetics of cancer in cats for the first time at scale, uncovering major overlaps with human cancers. Key mutations—like those linked to breast cancer—appear in both species, and some human cancer drugs may also work in cats. Because pets share our environments, these similarities could reveal shared causes of cancer. The research could lead to new treatments that benefit both animals and humans.

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Even JWST can’t see through this planet’s massive haze

Kepler-51d is a giant, ultra-light “super-puff” planet wrapped in an unusually thick haze that’s blocking scientists from seeing what it’s made of. Observations from JWST revealed that this haze may be one of the largest ever detected, possibly stretching as wide as Earth itself. The planet’s low density and close orbit don’t match existing models of how gas giants form or survive. Now, researchers are left with more questions than answers about how such a strange world came to be.

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Scientists just discovered bull sharks have friends

Bull sharks may have a reputation as lone hunters, but new research reveals they actually form social bonds and even have preferred “friends.” After six years of observing 184 sharks in Fiji, scientists discovered these animals don’t just mix randomly—they choose companions, swim together, and even follow one another in coordinated ways.

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Rare supernova from 10 billion years ago may reveal the secret of dark energy

Astronomers may have found an exciting new clue about dark energy—the mysterious force driving the universe’s accelerating expansion. They discovered an extraordinarily bright supernova from more than 10 billion years ago whose light was bent and magnified by a foreground galaxy, creating multiple images through gravitational lensing. Because the light from each image traveled slightly different paths, it arrived at Earth at different times, letting scientists effectively watch different moments of the same cosmic explosion simultaneously.

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A strange twist in the universe’s oldest light may be bigger than we thought

Scientists studying a mysterious effect called cosmic birefringence—a subtle twist in the polarization of the universe’s oldest light—have developed a new way to reduce uncertainty in how it’s measured. This faint rotation in the cosmic microwave background could point to entirely new physics, including hidden particles such as axions and clues about dark matter or dark energy.

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