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*'''[[Andrey Bolotov]]''', major 18th-century [[agriculturist]], discovered [[dichogamy]], pioneered [[cross-pollination] *'''[[Sergei Chetverikov]]''', pioneer of [[modern synthesis (20th century)|modern evolutionary synthesis]] ...

...ysics)|period]] of [[Cepheid]] [[variable stars]] at the beginning of 20th century. ...chemistry: their changing roles from alchemical times to the mid-twentieth century|last=F.|first=Rayner-Canham, Marelene|date=1998|publisher=American Chemical ...

...of the House of Representatives to honor the life and achievements of 19th Century Italian-American inventor Antonio Meucci, and his work in the invention of .... [https://archive.today/20120712220408/http://inventors.about.com/library/inventors/bl_Alessandro_Volta.htm Alessandro Volta - Biography of Alessandro Volta - ...

The '''history of radiation protection''' begins at the turn of the 19th and 20th centuries with the realization that [[ionizing radiation]] from natural and ...relessly, increasing awareness of the dangers of [[radiation]] in the 20th century led to the implementation of various preventive measures worldwide, resulti ...