In 1844, Charles Goodyear obtained the first patent for a rubber condom.
Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
Did you know?
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
Did you know?
Less than one of every three adults with high LDL cholesterol has the condition under control. Only 48.1% with the condition are being treated for it.
Did you know?
Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.
Shallow lakes can undergo succession.
Nucleic acids: DNA
Saturated Fatty Acids
Functional Groups of Carbon
Groups of Elephants
Estimates of the dates of origin and extinction of the three main groups of hominins (green, blue, a