Measuring species loss

It has been claimed that we are experiencing the greatest wave of extinction since the disappearance of the dinosaurs.

"Every hour," says the Convention on Biological Diversity, "three species disappear.

Every day up to 150 species are lost."

This week's More or Less explains why it is impossible to know for sure whether those numbers are even remotely accurate.

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10 minutes

Last on

Sun 22 Apr 2012 11:50 GMT

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