The spine (aka backbone) is a linked column of bones running from the head down to the lower back. Bone segments form the column. One bone segment is a vertebra, and multiple bone segments are ...

Blob can't do much, like lift his own head. He doesn't even have a head. 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 ...

Caption Correlation between the number of vertebrae and regions with habitat: Picture of the backbone of a species living in shallow waters (left) and the open ocean (right) showing the ...