Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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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
Human teeth are almost as hard as rocks!
47
By putting a frog in a bucket of milk, scientists following up on an ancient Russian way of keeping milk from going sour have identified a wealth of new antibiotic substances.
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The average sperm cell swims at 8 inches per hour.
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The human sigh acts as a physiological reset button.
23
Redheads require up to 20% more anesthesia to be knocked out.
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The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21