|
|
Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.
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.
The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
![Many gasoline service stations have signs posted warning customers to place plastic fuel containers ...](https://biology-forums.com/gallery/29/medium_548020_25_05_17_1_36_26_293801874.png)
![Cover and secure the cold source in place. Wrap the cold source using a towel or elastic bandage to ...](https://biology-forums.com/gallery/33/medium_380798_23_08_17_6_33_38_33286201.jpeg)