In 1994, the U.S. Department of Energy announced production of solar panels giving nearly twice the efficiency of existing panels. Made by United Solar Systems of Troy, Mich., these amorphous silicon submodule (1 ft2) panels converted 10.2% of solar energy into electricity, as compared to 6% previously possible.
|
In 1977, scientists at the Centers for Disease Control (CDC) in Atlanta, Georgia, USA, first announced* that they had sufficient laboratory evidence to implicate a bacterium as the cause of Legionnaire's Disease, now named Legionella pneumophila.
|
In 1911, the first landing of an aircraft on a ship took place as pilot Lt. Eugene B. Ely brought his 50-hp Curtiss pusher biplane in for a safe landing on a 119-ft wooden platform attached the deck of the U.S.S. Pennsylvania in San Francisco Harbor.
|