Re: "Real" ringworlds
My mistake. Ive just looked it up to confirm.
Fish have a two chambered heart and a single circulation (Heart->Gills->Body->Heart).
Mammals and birds have a 4 chanbered heart and a double circulation (Heart->Lungs->Heart->Body->Heart)
I got confused. 
It is more basic than a mammal heart however, so it still shows that you dont need a complete mammalian heart to have a working circulatory system.
[ May 16, 2003, 19:18: Message edited by: Primogenitor ]
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When a cat is dropped, it always lands on its feet, and when toast is dropped, it always lands with the buttered side facing down. I propose to strap buttered toast to the back of a cat. The two will hover, spinning inches above the ground. With a giant buttered cat array, I could conquer the world.
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