“beneath this crust, hundreds of fathoms down, there teems a world of checkered life in all its changing forms, a world of the same composition as ours, with the same instincts, the same sorrows, and also, no doubt, the same joys; everywhere the same struggle for existence. So it ever is. If we penetrate within even the hardest shell we come upon the pulsations of life, however thick the crust may be.”