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Your heart beats over 36 million times a year.
It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.
Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.
The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
![Lestidae is a rather small family of cosmopolitan, large-sized, slender damselflies. They are of the](https://biology-forums.com/gallery/47/medium_12359_26_04_12_9_45_30.jpeg)
![Pseudostigmatidae is a family of tropical damselflies, known as helicopter damselflies, giant damsel](https://biology-forums.com/gallery/47/medium_12359_26_04_12_10_00_03.jpeg)