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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.
Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).
The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
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.
The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.
![The Kingsley plantation, on Fort George Island in Jacksonville, Florida. Zephaniah Kingsley, the own](https://biology-forums.com/gallery/47/medium_375552_19_08_15_9_09_52_223231620.jpeg)
![A child in an orphanage in Juba, Sudan. The treatment of this child is likely to affect his ability ...](https://biology-forums.com/gallery/47/medium_660365_19_12_16_11_52_41_24332671.png)