1.If we could hear less than 20 Hz, we would hear... movements of their muscles. Squeak, squeak.
2.Theoretically, people can live happily until old age on butter and potatoes alone.
3.When our body does not get adequate nutrition, testosterone levels drop, while estrogen levels remain unchanged. This can lead to breast growth in men (gynecomastia) due to fasting. Men, eat!
4.Due to the fact that human fertility (the ability to bear children) tends to decline with increasing levels of wealth, the world's population is not likely to grow as rapidly as it did in the last century. According to some estimates, it will stop at about 10 billion.
5.Each person has a unique tongue pattern, just like fingerprints.
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