Germs Aid Valentines Attraction | Grey Wolf DNA Evidence | Animals Rewriting the Kama Sutra

Valentine's Science: How Mouth Germs Shape Attraction Lovers often talk of having chemistry with each other, but some research suggests they may share more than that, down to the bacteria living inside them.
Wayward Grand Canyon Wolf Was Killed in Utah, DNA Confirms DNA tests have confirmed that an endangered gray wolf killed in Utah in December was the same lone wolf that had been spotted and photographed near Arizona's Grand Canyon, the U.S. Fish and Wildlife Service announced this week.
	Could This 'Thinking Cap' Help You Learn? Vanderbilt University psychologist Geoffrey Woodman explains how he discovered a way to boost learning skills by pulsing a little bit of electricity into the brain in this latest interview and film from the U.S. National Science Foundation.
	6 Strangest Hearts in the Animal Kingdom Learn more about animal hearts — from the three-hearted octopus to the pseudo-hearted earthworm — to your heart's content.
	Liver Cancer: Symptoms and Treatment Liver cancer is caused by many conditions, including Hepatitis B and C, scarring of the liver, genetics and alcoholism.
	Sex in the Wild: 6 Ways Animals Get Their Groove On! Animals have myriad courtship behaviors, from the male porcupine urinating on the female to the male anglerfish latching onto the belly of the female.