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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?
About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
Did you know?
The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.
Did you know?
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
Did you know?
Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
![A study by Seehausen and van Alphen involving the effects of male coloration on female choice in Afr](https://biology-forums.com/gallery/47/medium_33_12_07_11_4_13_46.jpeg)
![Intramuscular drug administration: (c) the needle is inserted at a 90° angle: Source: Pearson Educat](https://biology-forums.com/gallery/47/medium_46687_08_12_14_5_05_08_195362384.jpeg)
![At breakfast, a middle-class husband sits absorbed in the newspaper and the public affairs of the da](https://biology-forums.com/gallery/47/medium_6_24_08_15_12_36_52_224132038.jpeg)