The human brain has the capacity to store everything that you experience.
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The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
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Due to the angle at which the optic nerve enters the brain, staring at a blue surface during sex greatly increases the intensity of orgasms.
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Our brains have a negativity bias and will remember bad memories more than good ones.
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Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
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Yawns are more contagious among people with closer relationships.
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The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
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You can't tickle yourself.
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