If the Universe Is Teeming with Aliens ... WHERE IS EVERYBODY?: Seventy-Five Solutions to the Fermi Paradox and the Problem of Extraterrestrial Life

by Stephen Webb

Or perhaps it’s possible to develop a mathematical system based upon the concepts of shape and size, rather than number and set as humans have done. Or perhaps the brains of extraterrestrials are so much more powerful than ours they can run numerical simulations in their heads (or whatever serves as their heads).