Perchance to dream? Study suggests spiders experience dreams while asleep

Jumping spiders display rapid eye movements and limb twitching similar to what is seen in dreaming dogs and cats, researchers say

The question is not do you have nightmares about spiders?" but, do spiders dream? About juicy flies, about humans, about anything at all?

A US-European research partnership suggests that thousands of species of jumping spiders might experience rapid eye movement stages of sleep. That is the state in which humans have their most vivid dreams, though the study in question stops well short of concluding that spiders have dreams.