A coiled serpent sliding through your dream can yank you out of sleep in seconds. Evolution primed human brains to notice that shape, and modern research backs it up: serpents rank among the five most ...

Ophidiophobia (the phobia of snakes) is one of the more common phobias psychologists treat today. Some researchers posit that this is an evolutionary response and that humans are wary of snakes ...

Add Yahoo as a preferred source to see more of our stories on Google. "Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Vivid, frightening dreams are ...