3 Funky things you didn’t know about sweat

Any woman who's ever reached for a glass of wine on a date only to reveal the soaked underarms of her outfit has probably wished she could remove her sweat glands. But long before pit stains became a social obstacle, perspiring was crucial to survival. "Sweat cooled off our ancestors in the grasslands of Africa," says anthropologist Helen Fisher, Ph.D. "It allowed them to hunt and forage without sweltering."

But a hot climate isn't the only thing that makes us sweat. Nerve-racking situations (e.g., a big job interview) can prompt the brain to trigger the release of stress hormones that raise your body's temperature enough to warrant a cooldown.

Here, three funky facts from the science of sweat.  More...Shine from yahoo