7.In rare cases, people who have sustained injuries to their right anterior cerebral hemisphere will develop "Gourmand syndrome": an eating disorder in which the person becomes obsessed with eating and thinking about fine foods.
8.Speaking of rare disorders, people with Exploding Head Syndrome will hear a loud bang in their heads, like a bomb exploding, right as they're falling asleep.
9.And heartbreak is more than a metaphor: Broken Heart Syndrome mimics a heart attack and is spurred by stressful or tragic situations.
18.Humans — like all mammals — have a "diving reflex" which instinctively shuts down certain parts of the body to conserve energy when submerged in cold water.
19.Tears that are shed for different reasons — like, from sadness, or happiness, or an onion — actually have different compositions.
20.Pregnant women's brains shrink during pregnancy and take six months post-delivery to get back to its previous size.