The island of Great Britain, along with the rest of the archipelago known as the British Isles, has a largely temperate climate. It contains a relatively small fraction of the world's wildlife. The biota was severely diminished in the last Ice Age, and shortly (in geological terms) thereafter was separated from the continent by the English Channel's formation. Since then, man has hunted the most dangerous forms (the wolf, the brown bear and the wild boar) to extinction, though domesticated forms such as the dog and the pig remain.