This extinct fish used its hand-like fins to "walk" on the ocean floor.
Find out everything there is to know about extinction and stay updated on the latest extinction news with the comprehensive articles, interactive features and pictures at LiveScience. Learn more about amazing discoveries scientists are making as they uncover the causes and other details of major extinctions throughout history.
Rediscovered footage of a thylacine taken in 1935 is the last-known recording of the marsupial, which went extinct in 1936.
Tens of thousands of years ago, a feces-contaminated wallow may have caused the deaths of nearly two dozen giant ground sloths.
The Chinese paddlefish, which could grow up to 23 feet long, may be the first official extinction of 2020.
Was the planet ever as hot as it is today, when every month the globe seems to be breaking one high-temperature record after another?
Three new plant species have disappeared from Earth every year since 1900, an alarming new analysis found.
A fossil site in North Dakota preserves a unique snapshot of the minutes after an asteroid struck Earth around 66 million years ago.
What happened after the Cretaceous-ending asteroid struck Earth? A new fossil site may have answers.
George the snail won't be leaving any more silvery trails in his wake. The 14-year-old champ — the last known snail of his species — died in captivity on New Year's Day, 2019.
Colombian researchers hope to revive an endangered species by rehabilitating monkeys confiscated from smugglers. The captive animals' struggles show that survival is not guaranteed.