Evolution

A 236-million-year-old fossil challenges the story of mammalian live birth

Some cynodonts may have been giving birth to live young much sooner in evolutionary history than previously assumed. A new Frontiers in Mammal Science study has offered the first compelling evidence that cynodonts may have ...

Earth Sciences

African grasslands expanded 5 million year earlier than previously thought, molecular fossils suggest

The iconic grassland savannas of Africa are geographically extensive and important for both local fauna and the global climate. But where did they come from, and how will they change in the future? Ongoing warming, rising ...

Taking the stairs could cut risk of early death

Taking the stairs could help you live longer—according to new research from the University of East Anglia and the Norfolk and Norwich University Hospital. The study, published today, suggests that climbing stairs significantly ...

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Consumer & Gadgets
Should people marry AI agents?

Credit ratings can shape corporate financial decisions

On the surface, credit rating agencies simply score a company's financial health. They look at a business's equity and debt and diagnose how risky it is for investors. They slap on a letter grade to show how likely it is ...

What if there's a star inside a black hole?

There is a question that often comes up at every public talk I do, and I have never had a good answer to it—well, not an entirely confident one. What's inside a black hole? The textbook reply is a singularity. Cross the event ...