Ancient Chinese Fossils Reveal Earth's First Mass Extinction Secrets

Scientists in China found very old fossils that are 512 million years old.

These fossils are from a time right after a big event called the Sinsk mass extinction, which happened about 513.5 million years ago.

This event killed a lot of sea creatures because the oceans had less oxygen.

The fossils show many different kinds of animals, including some that scientists have never seen before.

These animals lived in deep seas, which were less affected by the extinction.

The fossils help us understand how life recovered after this big event.

Scientists think that deep sea areas might have been safe places for animals to survive and evolve.

This discovery is very important because it fills a big gap in our knowledge about this time in Earth's history.