… Extinction is a principle of evolution and well over 99% of the species that have ever lived have become extinct. Previously it was believed to be Extinct, but the rediscovery of 12 plants (occurring in two separate subpopulations) resulted in it being … It was the mass extinction that saw dinosaurs wiped from the face of the earth. Thus, today, some of these diseases have virtually disappeared from the face of the earth. Coelacanths—ancient 6-foot long fish rediscovered in South Africa in 1938 and in … Vascular Plants (ToL: Embryophytes [land plants]