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Stories about: chordates

Experts Find Oldest Vertebrate in the World Researchers in the United Kingdom and Canada announce the discovery of the oldest known vertebrate, a creature that lived about 505 million years ago. This finding makes the animal the ancestor of all known vertebrates that ever lived, including humans. The fossil was discovered in the Yoho National Park, Canada, i... 6 March 2012 07:50 GMT New Insight into How Early Human Embryos Developed The human heart is a mystery from many points of view. It produces a complex electrical field all on its own, and is the only muscle in the body that never takes a break from its chores. It comprises an intricate web of various types of cells, which all work together to keep the heart beating. Scientists have for man... 30 July 2010 06:33 GMT