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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?
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
Did you know?
Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.
Did you know?
Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
Did you know?
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
![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)
![Burkholder and colleagues demonstrated that some strains of Pfiesteria shumwayae are toxic to fish a](https://biology-forums.com/gallery/47/medium_33_15_07_11_12_22_52.jpeg)