The human brain uses approximately as much energy as a 10 watt light bulb.
120
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
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
Only humans shed emotional tears.
331
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
You can't tickle yourself.
29
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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