So the species became smaller and the former large groups dispersed.

All species had become extinct by 1987, with the probable cause being disease.

With today's announced discovery, two new species have become known in the last year.

But he's working at a time when that species has become nearly extinct.

Many species have become extinct, and more than 1000 are endangered.

"As you know, your species also became bigger and stronger."

However, more and more species are becoming available each year.

The species has become established in many areas outside its native range.

It's made us truly whole in a way few species ever become.

At the same time, some 200 native species have become extinct.