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May 19 in history: Jean-Pierre Christin invents the Celsius thermometer and more

1743
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1743

Jean-Pierre Christin invents the Celsius thermometer

1971
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1971

USSR launches Mars 2

1995
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1995

Balamurali Ambati becomes the youngest doctor at the age of 17

2015
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2015

Ruptured pipeline spills about 3,400 barrels of crude oil near Refugio Beach

2016
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2016

EgyptAir flight 804 disappears over the Mediterranean Sea