We'd wonder how the constellations had looked to all those extinct animals.

The room to him is a world, a pocket of the past, where extinct animals can talk.

The room was a world, a pocket of the past where extinct animals could walk.

And if you could bring the quagga back to life, why not other extinct animals?

They, and only they, kept man from becoming very quickly another extinct animal.

The largest extinct animals known to date are listed here.

Before my research, we thought these extinct animals had been herbivorous.

You can see extinct animals from all over the world in their clothes.

"But I personally refuse to wear real live extinct animals."

As a sort of warmup exercise, he began working on extinct animals.