Polio is a deadly virus. Some people get paralyzed by it. Ancient people were aware of it. Rosevelt contracted it once. Jonas Salk was born in New York City in 1914. He became a medical researcher. He learned about viruses under other doctors. He invented the polio vaccine in 1955. It stops you from contracting polio. He became world-famous. 9 million doses were preordered.
Malcolm McLean was born in North Carolina in 1913. He wanted to ship trucks by boat. He launched the intermodal container ship in 1956. The cost of shipping fell because of it. He expanded his business. It gave rise to just in time. It really helped us in life.
Noyce and Kilby invented the integrated circuit in 1959. The integrated circuit is just a flat chip packed full of transistors. It has high performance and low cost. It sent men to the moon. It allowed astronauts to control the spaceships. US Air Force and Navy used it in warfare.
The invention of the laser was a team effort at bell labs. Charles Townes was born in South Carolina in 1915. He invented the maser in 1953. He patented the laser in 1958. The light of a laser is coherent electrons give us the energy to move closer to nuclear. The bean contains high focused energy. The laser also measures distances to the moon. Lasers also have medical uses too. I think the laser is very helpful to human history.
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