Why don't vampires usually get women pregnant?They can't come inside without permission.
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Without sleep, the emotional centers of our brains dramatically overreact to bad experiences, research now reveals.ADVERTISEMENT"When we're sleep deprived, it's really as if the brain is reverting to more primitive behavior, regressing in terms of the control humans normally have over their emotions," researcher Matthew Walker, a neuroscientist at the University of California, Berkeley, told LiveScience.