animal life

Then in the Cambrian era, around 570 million years ago, recognizably complex animal life evolved, including vertebrate ancestors.

However, complex animal life—everything from insects to fish to humans—took a lot longer to show up.

The impulse to study appearances appears to reach far down in animal life.

The beasts of the field, and the fowls of heaven, in common with man, enjoy the benefits of an animal life.

Is it merely the physical force, the animal life contained in a given quantity of muscle and bone?

As we paddled on, the scenery changed, and animal life became more abundant.

We fell in with a countless variety of animal life in enormous quantities as we sailed along within the reef.