20 Animals and Their Prehistoric Ancestors – A Spectacular Comparison of Their Size

#1 The great white shark and the megalodon

#2 The Komodo dragon and the megalania

#3 The African lion and the American lion

#4 The Asian elephant and the mammoth

#5 The wombat and the diprotodon

#6 The white rhinoceros and the woolly rhinoceros

#7 The white rhinoceros and the paraceratherium

#8 The sloth and its ancestor

#9 The cheetah and the great cheetah (though it's not as great as the name might suggest)

#10 The boar and the daeodon

#11 The American buffalo and the latifrons buffalo

#12 The dugong and its ancestor

#13 The giant armadillo and the glyptodon

#14 The indri and the extinct giant lemur

#15 The leopard and the saber-toothed tiger

#16 The common horse and the giant horse

#17 The capybara and its ancestor

#18 The spectacled bear and the arctodus (the short-faced bear)

#19 The Sumatran orangutan and its ancestor

#20 The Siberian tiger the Ngandong tiger