Intriguingly though, this much older early Siberian dog seems to have hit an evolutionary dead end.

That may explain why they were an evolutionary dead end.

The tailless monkeys seem to be at an evolutionary dead end.

Worse than that, Dure, it is an evolutionary dead end.

A man who is not patriotic is an evolutionary dead end.

If you are not an evolutionary dead end, then most of the human race is.

Because Hybrids require cybernetic support to live, this was considered an evolutionary dead end.

From the point of view of the bacterium, human infection is an evolutionary "dead end".

Yet islands have generally been considered evolutionary dead ends.

This must have been an evolutionary dead end.