Red, blue, green, even purple--animal blood comes in a wide range of colors! Check out these 10 amazing types of animals with blue blood.

Evidence of this explosion is present throughout the Burgess Shale, leading to its establishment as a world heritage site by UNESCO in 1981, NPS said. Yoho National Park is in the Canadian Rockies of ...

The origin of reptiles on Earth has been shown to be up to 40 million years earlier than previously thought -- thanks to evidence discovered at an Australian fossil site that represents a critical ...