One of the laws of paleontology is that an animal which must protect itself with thick armour is degenerate. It is usually a sign that the species is on the road to extinction.
John SteinbeckWhy, Tom - us people will go on livin' when all them people is gone. Why, Tom, we're the people that live. They ain't gonna wipe us out. Why, we're the people - we go on.' 'We take a beatin' all the time.' 'I know.' Ma chuckled. 'Maybe that makes us tough. Rich fellas come up an' they die, an' their kids ain't no good, an' they die out. But, Tom, we keep a-comin'. Don' you fret none, Tom. A different time's comin'.
John Steinbeck