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Did you know?
The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
Did you know?
Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.
Did you know?
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
Did you know?
On average, the stomach produces 2 L of hydrochloric acid per day.
Did you know?
Human kidneys will clean about 1 million gallons of blood in an average lifetime.