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?
There are more bacteria in your mouth than there are people in the world.
Did you know?
There are more sensory neurons in the tongue than in any other part of the body.
Did you know?
The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.
Did you know?
There are 60,000 miles of blood vessels in every adult human.
Comparison of Chronometric Techniques
Kinetic Energy
Energy Production
Simple Decorating Techniques: Side masking
A 2-kg box of taffy candy has 40 J of potential energy relative to the ground. Its height above ...
Expressing amounts of energy in different energy units is necessary to solve many chemistry ...