An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
Babies crawl an average of 200m a day.
212
Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
94
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
It takes approximately 12 hours for food to entirely digest.
93