In 1844, Charles Goodyear obtained the first patent for a rubber condom.
Did you know?
Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.
Did you know?
Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
Did you know?
Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.
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.
Blood Flow - Heart Chambers
Normal conduction pathway in the heart
Influence of enzyme-substrate affinity on the rate of an enzyme-catalyzed reaction.
Desired Fertility versus Total Fertility Rate in Developing Countries
A bus starts from restat a station and accelerates at a rate of 2 m/s^2 for 15 seconds. It then runs