Creatures that bridged the gap between reptiles and mammals may have been bearing live young 90 million years earlier than we thought. One of the hallmarks of all mammals apart from monotremes – ...

Explore the 25 incredible new species discovered in 2014, from the 'chicken from hell' dinosaur to a cartwheeling spider.

Scientists have long thought cynodonts, the ancestors of all modern mammals, laid eggs. For the first time, researchers have found evidence to the contrary.

Human childbirth is often difficult and incredibly painful—just ask anyone who’s been through it. And for a long time, childbirth seemed to be uniquely difficult for humans. But a new study suggests ...

‘Nanomolar vanillin, an e-cigarette flavorant, appears to disrupt pluripotency and promote endodermal differentiation in human embryonic stem cells via TRPV4 activation’ by Shabnam Etemadi et al. was ...

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The strawberry poison dart frog raises its young scattered across dozens of tiny rainforest pools, but keeping each tadpole ...

Scientists may have uncovered evidence that a mammal ancestor was giving birth to live young 236 million years ago. A fossilized cynodont showed a neonatal growth line and an unusually large birth ...

In the lab, female frogs were less likely to choose preferred males as mating calls increased, potentially giving other males a better shot.