Telescope
An optical instrument designed to make distant objects appear nearer, containing an arrangement of lenses, or of curved mirrors and lenses, by which rays of light are collected and focused and the resulting image magnified.
An optical instrument designed to make distant objects appear nearer, containing an arrangement of lenses, or of curved mirrors and lenses, by which rays of light are collected and focused and the resulting image magnified.
Penicillin
Penicillin (sometimes abbreviated PCN or pen) is a group of antibiotics derivedfrom Penicillium fungi, including penicillin G (intravenous use), penicillin V (oraluse), procaine penicillin, and benzathine penicillin (intramuscular use). Penicilin was invented by Alexander Fleming in 1928.
Wilhelm Roentgen or Röntgen made medical history by discovering what are now called x-rays. The discovery earned Röntgen much fame and it resulted in him being award a Nobel Prize.
Steam Engine
A steam engine is a heat engine that performs mechanical work using steam as its working fluid.Using boiling water to produce mechanical motion goes back over 2000 years, but early devices were not practical. The Spanish inventor Jerónimo de Ayanz y Beaumont patented in 1606 the first steam engine. In 1698 Thomas Savery patented a steam pump that used steam in direct contact with the water being pumped. Savery's steam pump used condensing steam to create a vacuum and draw water into a chamber, and then applied pressurized steam to further pump the water. Thomas Newcomen's atmospheric engine was the first commercial true steam engine using a piston, and was used in 1712 for pumping in a mine. James Watt invented the steam engine.
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