Page:Following the Equator (Mark Twain).djvu/113

Rh a bird, for it lays eggs, and hatches them; it is clearly a mammal, for it nurses its young; and it is manifestly a kind of Christian, for it keeps the Sabbath when there is anybody around, and when there isn't, doesn't. It has all the tastes there are except refined ones, it has all the habits there are except good ones.

"It is a survival—a survival of the fittest. Mr. Darwin invented the theory that goes by that name, but the Ornithorhyncus was the first to put it to actual experiment and prove that it could be done. Hence it should have as much of the credit as Mr. Darwin. It was never in the Ark; you will find no mention of it there; it nobly stayed out and worked the theory. Of all creatures in the world it was the only one properly equipped for the test. The Ark was thirteen months afloat, and all the globe submerged; no land visible above the flood, no vegetation, no food for a mammal to eat, nor water for a mammal to drink; for all mammal food was destroyed, and when the pure floods from heaven and the salt oceans of the earth mingled their waters and rose above the mountain tops, the result was a drink which no bird or