The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
Did you know?
The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
Did you know?
There are more bacteria in your mouth than there are people in the world.
Did you know?
More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.
Did you know?
There are 20 feet of blood vessels in each square inch of human skin.
Here's how comic book heroes are made
Chair made from tree
EMERGENCY TRAUMA ASSESSMENT MADE EASY
Attributed to Thomas Dennis or William Searle, Chest, made in Ipswich, Massachusetts.
Wedge-shaped oil film curved around a bearing journal.