More people have a phobia of frogs than rats.
41
Dogs can be trained to identify the scent of lung cancer long before symptoms develop.
190
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22
Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
In older people, memory is best early in the morning and then declines during the late afternoon.
33
It takes about 20 seconds for a red blood cell to circle the whole body.
102