The Most Bizarre Medical Tools from Back in the Day

Cobalt Bomb Machine

Although the name sounds scary, it isn’t as intense as it sounds. This was used to help detect and cure cancer in the early 20th century.

Parts of the Great Wall of China were made with sticky rice.
Glaciers and ice sheets hold about 69 percent of the world's freshwater.
The smallest bone in your body is in your ear.
The stars and flashes of light you see when you rub your eyes are called "phosphenes."