A human brain produces as many as 12,000 to 50,000 thoughts per day, depending on how deep a thinker a person is.
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When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
Our brains have a negativity bias and will remember bad memories more than good ones.
15
We share 70% of our DNA with a slug.
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Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
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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
You can't tickle yourself.
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