There are actually seven different types of twins: Identical, Fraternal, Mirror-Image, Polar Body (Half Identical), Mixed Chromosome, Superfecundation, and Superfetation.
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Every three seconds, a new baby is born.
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If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
On average women can hear better than men.
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A person swallows approximately 295 times while eating dinner.
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35% of the people using personal ads for dating are already married!
23
Only about 2% of the world population has green eyes.
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Humans blink over 10,000,000 times a year!
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