Dogs can be trained to identify the scent of lung cancer long before symptoms develop.
190
The skin on your lips is 200 times more sensitive than your fingertips.
345
The average sperm cell swims at 8 inches per hour.
4
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
12
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
Those who get out of bed by 7am are more likely to be thinner and happier.
20
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