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Rh promise of response to that question which man instinctively makes as he gazes up at the stars: What goes on upon all those distant globes? Are they worlds, or are they mere masses of matter? Are physical forces alone at work there, or has evolution begotten something more complex, something not unakin to what we know on Earth as life? It is in this that lies the peculiar interest of Mars.

That just as there are other masses of matter than our globe, so there are among them other worlds than ours is an instant and inevitable inference from what we see about us. That we are the only part of the cosmos possessing what we are pleased to call mind is so earth-centred a supposition, that it recalls the other earth-centred view once so devoutly held, that our little globe was the point about which the whole company of heaven was good enough to turn. Indeed, there was much more reason to think that then, than to think this now, for there was at least the appearance of turning, whereas there is no indication that we are sole denizens of all we survey, and every inference that we are not.

That we are in some wise kin to all the rest of the cosmos, science has been steadily demonstrating more and more clearly. The essential oneness of the universe is the goal to which all learning tends. Just as Newton proved all the