The Secret Life of Nature: Living in Harmony With the Hidden World of Nature Spirits from Fairies to Quarks

98 fi The Secret Lge of Nature

whether to behave as a wave or a particle when detected by a human
observer. And in quantum mechanics, if an electron interacts with an-
other electron, a relation is maintained between their quantum states
irrespective of however far apart they may wander in the universe.This
means-and it is something Einstein didn't like-that if you observe
an electron and discover the direction of its spin, the direction of the
spin of the other electron, by some sort of magic, will be simultane-
ously decided, in the opposite direction, no matter where it may be.