In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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The horizontal fraction bar was introduced by the Arabs.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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The longest a person has survived after a heart transplant is 24 years.
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In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.
Technique of Light Palpation
Insects Under the Electron Microscope
Scorpions, Spiders and Sharks: Electron-Microscope Images
A t-rex hiding under the microscope
The surface temperature of the star is 6000 K. At what wavelength is its light output a maximum
Events in human fertilization. The light micrograph shows a fertilized human oocyte.