Earth has 8.7mn species

A group of researchers from Canada’s Dalhousie University has estimated that 8.7 million species exist on Earth.

A group of researchers from Canada's Dalhousie University has estimated that 8.7 million species exist on Earth.

The researchers, however, say 86% of all terrestrial species and 91% of all marine species are yet to be discovered, described and catalogued.

( In exclusive partnership with The Washington Post. For more, log on to www.washingtonpost.com )