Vertebrates
A Vertebrate is an animal with a backbone. There are a number of different types of vertebrate like: mammals, birds, reptiles, amphibians etc. Vertebrates were found about 525 million years ago during the Cambrian period. There are about 64 000 species that are vertebrates, it may sound like a lot but that`s only 3% of all the animals on the earth! Did you know, that the first ocean vertebrates were alive since about 470 000 000 years ago? Its so cool to know that we are living around so many vertebrates from so long ago and still more and more are being found!