When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
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The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
A human being loses an average of 40 to 100 strands of hair a day.
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It takes twice as long to lose new muscle if you stop working out than it did to gain it.
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Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
34
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
31