Complex sentence: During the last ice age, humans and neanderthals hunted mammoths and woolly rhinoceroses by driving them over cliffs; evidence has been found at La Cotte de St Brelade on the island of Jersey.
Split into simpler sentences: During the last ice age, humans and neanderthals hunted mammoths and woolly rhinos by driving them off cliffs. Evidence of this has been found at La Cotte de St Brelade on the island of Jersey.