There are millions of different types of living things on Earth. In order to keep track of them all, scientists put living things into groups based on characteristics that they have that are the same.

MPs were told athletes were threatened with not being selected - Dan Roan reports British athletes were threatened with not being selected if they spoke out about classification concerns in Paralympic ...

Athletes are grouped depending on the level of their impairment to try to ensure fair competition With a medal being handed back, officials alleging dirty tricks, and calls for an independent system ...