The sudden appearance of complex animals has led scientists to argue that animals must have a “hidden history”, a period in ...

Our blue planet is home to countless creatures, some well-known, others still shrouded in mystery. From tiny tardigrades to massive blue whales, the diversity of life today reflects billions of years ...

Ever wonder what the very first animal on Earth was? 🐾 Scientists believe they’ve finally figured it out, and it’s not what you’d expect! It wasn’t a dinosaur or a giant sea creature—it was a simple, ...

Molecular clocks push the dawn of animal life back to a frozen world 800 million years ago.

Add Yahoo as a preferred source to see more of our stories on Google. The answer to this question is heavily debated by scientists. Dozens of different studies using everything from chromosome ...

Animals seem to appear in the fossil record fairly suddenly, a little over half a billion years ago. Yet rocks can preserve microscopic life in remarkable detail and still contain no animals, even ...

The earliest animals may have evolved hundreds of millions of years before their first unmistakable fossils appear in the fossil record, according to a new study led by the University of Oxford. The ...

NOTE: As of Jan. 9, 2026, the authors requested that the paper be retracted because of errors in the analysis. A reanalysis of the data will be posted at a later date. Biologists who study the ...

The next time you go wild swimming, whether in a lake, river or sea, you are probably sharing the water with one of your tiniest, yet closest relatives. Choanoflagellates, like most single celled ...