In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.
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Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.
Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones
Shooting star
Spectra of a Metal-Poor and a Metal-Rich Star
A Rotating, Magnetized Neutron Star
A star link-type network where all of the modules are connected together using splice packs.