Your heart will pump about 212 million liters in its lifetime.
26
Flu shots only work about 70% of the time.
18
Your thumb is about the same size as your nose.
124
Ingrown toenails are hereditary.
15
Unlike dogs, pigs, and some other mammals, humans cannot taste water. They taste only the chemicals and impurities in the water.
95
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
