He had spent his life studying how different species of birds developed their songs and calls.

"Scientists have long debated whether any other species can develop the ability to learn human language."

These species developed under different life conditions independently from each other within the various lakes.

That's why I feel that this larger species will develop a sudden desire to be on the move again.

In fact, estimates are that at least 1,000 species have developed field resistance to pesticides.

Over the course of evolution, each species develops larger body sizes.

Many, but not all, species develop an above ground stem.

Your species has developed an extensive system of engineering using alternating current.

Their nature took them in directions your species haven't even developed the concepts for yet.

One assumption is that any intelligent species will in due course develop a technology, just as we have done.