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A surprising new discovery suggests that tiny microbes living inside fish may be helping shape the chemistry of the world's oceans. Scientists found evidence that bacteria in the guts of marine fish work alongside their hosts to produce calcium ...

Scientists have uncovered a surprising navigation system in pigeons: iron-filled immune cells in the liver that may act like tiny magnetic sensors. Birds deprived of these cells struggled to find their way home under overcast skies, indicating they . ...

New DNA evidence shows that Europe's hunter-gatherers and early farmers interacted far more closely than previously thought, with women likely playing a crucial role in spreading farming across northwestern Europe. Centuries later, the arrival of ...

Scientists have discovered Labrujasuchus expectatus, a bizarre crocodile relative that looked more like an ostrich-like dinosaur than anything resembling a modern crocodile. It walked on two legs, had tiny arms, and sported a toothless beak--an ...

A newly discovered raptor-like dinosaur from Patagonia is changing how scientists think about ancient predators. Named Kank australis, the 70-million-year-old dinosaur appears to have hunted fish much like modern herons, using a long, flexible neck . ...

A major research study is challenging one of evolution's most influential ideas: that most genetic changes that become permanent are essentially neutral. Researchers at the University of Michigan found that beneficial mutations are actually far more ...

Scientists say moons around rogue planets wandering through the galaxy could remain warm enough for life thanks to tidal heating and hydrogen-rich atmospheres. These dark, starless worlds may have had stable oceans for billions of years -- long ...

A new study suggests Antarctica's ice sheet hit a climate tipping point about one million years ago, making it far more reactive to temperature and CO2 changes. Researchers warn this surprising sensitivity could offer clues about how the continent .. ...

Scientists have solved the mystery of the Seychelles' vanished crocodiles using DNA from historic museum specimens. The reptiles were not a unique species after all, but an isolated population of saltwater crocodiles that likely drifted thousands of ...

The Arctic Ocean may have crossed a dangerous tipping point. Scientists say the rapid disappearance of sea ice is triggering a hidden chemical shift that is stripping the ocean of nitrate -- a nutrient essential for the tiny plankton that support ...