When you look up at the blue sky and see white dots flying around, you’re actually seeing your own white blood cells.
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Only 1% of bacteria cause disease.
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During a typical human life span, the human heart will beat approximately 2.5 billion times.
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Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
26
Flu shots only work about 70% of the time.
18
There is a disease called ichthyosis that turns the skin scaly like a fish.
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The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15
Scientists estimate that laughing 100 times is equivalent to a 10-minute workout on a rowing machine.
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