On the other hand, maybe some new set of researchers had developed a different, more reliable process for ascending the evolutionary ladder.

He's prepared to do anything to climb down the evolutionary ladder, even undergo physical change.

Perhaps it was boredom, not intelligence, that had propelled them up the evolutionary ladder.

It looked like a plausible development from this animal but several million years up the evolutionary ladder.

Performers, after all, stand a rung or two lower than composers on the evolutionary ladder.

It is helping to prepare man for his next step up the evolutionary ladder.

Rather than drawing some evolutionary ladder or tree, the best representation is a sort of multi-twigged bush.

Creatures lower on the evolutionary ladder were certainly aware of the Moon.

They've got a mission to bring other intelligent species to a higher rung on the evolutionary ladder.

Zaretts do not seem so high on the evolutionary ladder.