In 1844, Charles Goodyear obtained the first patent for a rubber condom.
Did you know?
People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
Did you know?
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?
After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
Did you know?
One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.
Structure of the mitotic spindle.
Structure of a Cell
Vienna: Social Structure and Social Interaction
Structure of molybdenum-dependent nitrogenase from Azotobacter vinelandii
Subunit structure of the E. coli DNA polymerase III holoenzyme
Orientation and structure of a nephron, the functional unit of the kidney.