Dinosaurs are now extinct. ✬

Unless whales are protected, they will become extinct. ✬

Dinosaurs became extinct a very long time ago. ✬

The dodo is an already extinct species. ✬

Once a species goes extinct, it's gone forever. ✬

How do you think humans are going to become extinct? ✬

Dinosaurs went extinct about 65 million years ago. ✬

That species is already extinct. ✬

The mammoth is a fascinating animal. Too bad it's extinct. ✬