Among them were the chordates, to which vertebrates (animals with backbones) such as humans belong. What sparked this biological bonanza isn't clear. It may be that oxygen in the atmosphere ...

Animals are divided into two main groups: Animals with a backbone are called vertebrates. Animals without a backbone are called invertebrates. Vertebrates and invertebrates can be sorted into ...

It could be seen in the segmented bodies of worms, in the vertebrae of animals with backbones, in the head-thorax-abdomen construction of insects. In all of these, modular units like Lego TM ...

A recently introduced Ohio bill would increase penalties for animal abuse and add limitations for offenders who seek to own ...

If Blob had been born with a spine, or backbone, he would have been a vertebrate. If we give Blob some legs and a head then he can start to move about. There are lots of vertebrates in the animal ...