Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
On average a woman has 4 sexual partners in her lifetime.
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