The average sperm cell swims at 8 inches per hour.
4
25% of your bones are located in your feet.
12
Brain scans show that people who view photos of a beloved experience an activation of the caudate - the part of the brain involving cravings.
103
In older people, memory is best early in the morning and then declines during the late afternoon.
33
A human brain produces as many as 12,000 to 50,000 thoughts per day, depending on how deep a thinker a person is.
23
Your heart rate can rise as much as 30% during a yawn.
69