1. They had been thought to be extinct for about 160 years before being found again in Spain in 2010.

2. There are lots of large animals around the world that go extinct at this time.

3. They also disappeared from human notice and were declared extinct for more than a century.

4. When it comes to extinct creatures, few are as commonly known as the dodo.

5. When something goes extinct, it hits us in the marrow.

6. The results could even shed light on extinct massive animals, like dinosaurs, the researchers said.

7. Either we spread earth to other planets, or we risk going extinct, Musk said.

8. The extinct fish was relatively small, measuring up to about 2 inches long.

9. Scientists found 46 specimens from four different species of extinct ichthyosaurs.