Thomas Huxley produces serious evidence that man was descended from an ape-like ancestor, his critics quite rightly pointed out that there was a large gap between men and apes. For such hypothetical fossils they coined the phrase missing links. Since that day two essential links have been added. Dubois found skulls and other bones in Java which he assigned to the genus Pithecanthropus. There is not much doubt now, because very similar skulls from the neighbourhood of Pekin were associated with stone tools, and palaeontologists are agreed that an ape-like creature which used tools deserves the right to be called man. At any rate Marx is generally accepted now by people who would be horrified to be called Marxists. Gigantic forms closely related to the Java and Pekin men have also been found in Java and China. A chimpanzee can get away from a lion by climbing, and can move through the trees far faster than a leopard.