They range from 450 million years ago to the last, the K-T, number four, but the biggest of all was the P, or the Permian extinction, sometimes called the mother of all mass extinctions.
De spænder fra 450 millioner år siden til den sidste, K-T, nummer fire, men den største af alle var P eller Perm-udslettelsen, undertiden kaldet moderen til alle masseudslettelser.