Sentence examples for had become extinct from inspiring English sources

Ankylosaurians and ornithopods were also becoming more common, but prosauropods had become extinct.

By that time, the genus Paranthropus had become extinct.

By the end of the Pleistocene, horses had become extinct in the New World.

Until then it was thought that they had become extinct 400,000,000 years ago.

These constituted astonishing new evidence that whole species of animals had become extinct.

Bythe mid-20th century, the species Equus ferus had become extinct in the wild.

Of these, 21 have become extinct in the past century, and another 120 species are in danger of extinction.

Ostriches have become extinct.

Lions and rhinoceroses have become extinct in the region.

And as old species have become extinct, new ones have been evolving.

This isn't to say that strong-minded managers have become extinct.