The U.K media's gone a bit re-wilding mad in the last couple of weeks after notoriously outspoken environmentalist George Monbiot published both this article and accompanying animation on the subject.

Dozens of megafauna (large animals over 100 pounds) – such as giant tortoises, horses, elephants, and cheetah – went extinct in North America13,000 years ago during the end of the Pleistocene. As is ...