Bearing a male child can alter a woman's brain by leaving male DNA that can persist for the rest of her life, making her less likely to suffer from Alzheimer's disease, promote tissue repair, and improve her immune system.
16
The average tastebud lives only 10 days before it dies and is replaced by a new one.
15
An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
73
The male fetus is capable of attaining an erection during the last trimester.
75
Redheads require more anesthesia to 'go under' than other hair colors do.
51
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
You're born with 300 bones, but when you get to be an adult, you only have 206!
17