Oscar Hertwig

German zoologist (1849-1922) · Germany · On the map · Scientists · Died at 73

Oscar Hertwig was a German embryologist and zoologist known for his research in developmental biology and evolution. Hertwig is credited as the first person to observe sexual reproduction at the cellular level, by looking at the cells of sea urchins under the microscope.

Oscar Hertwig is read about 23 times a day, in 22 languages.

A typical day, 30 days to 6 November 2026

The middle day of the days counted, so one week of news cannot move it. The line under it is the last 104 days, one point a day.

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Illustration from O. Hertwig's book Lehrbuch der Entwicklungsgeschichte des Menschen und der Wirbeltiere (Textbook of developmental history of humans and vertebrates), 1906.

About this person

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Germany

Scientists from Germany 6

Johann Adam Schall von Bell52.0 of 100 Karl Wilhelm Reinmuth52.0 of 100

Friedrich Kohlrausch52.1 of 100

Gustave Whitehead51.9 of 100

Jacob Christian Schäffer52.1 of 100

Erich Hückel51.8 of 100