The average sperm cell swims at 8 inches per hour.
4
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Tigers can see 6 times better at night than humans.
305
Your heart will pump about 212 million liters in its lifetime.
26
Our Right Lungs takes more air than our left lung.
194
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15