The science of aliens

Descripción

"What would aliens look like? An intelligent octopus-like creature is certainly plausible. What about odd numbers of limbs - a three-legged alien with three arms and three eyes? Could there be an entire planet of immobile, silicon-based "trees" that communicate with each other via electrical signals? The Science of Aliens gets weirder still. Could a giant interstellar cloud be "alive" and intelligent? Could creatures live at extremely high pressures and temperatures? Would they have any interest in abducting us? Would they want to have sex with us?"--Jacket.