James David Forbes (1809–1868) was a Scottish physicist and glaciologist who worked extensively on the conduction of heat and seismology.
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Also born on April 20
Politician
1889–1945 · Austria
Adolf Hitler was an Austrian-born German politician who was dictator of Germany in the Nazi era from 1933 until his suicide in 1945.
Athlete
1997 · Germany
Alexander "Sascha" Zverev is a German professional tennis player. He has a career-high singles ranking of world No. 2 by the ATP achieved in June 2022 and in 2026.
si. robi, CC BY-SA 2.0, via Wikimedia Commons
Founder · Vivendi
1808–1873 · France
Napoleon III was the first President of France from 1848 to 1852 and then Emperor of the French from 1852 until his deposition in 1870. He was the first elected president, second emperor, and the last monarch of France.
Mayer & Peirson, France, Public domain, via Wikimedia Commons
Actor
1964 · United Kingdom
Andrew Clement Serkis is an English actor and director.
Fandomuniverse, CC0, via Wikimedia Commons
Actor
1949 · United States
Jessica Phyllis Lange is an American actress and photographer. With a career spanning over five decades, she is known for her roles on stage and screen.
iDominick, CC BY-SA 2.0, via Wikimedia Commons
Swedish geneticist
1955 · Sweden
Svante Pääbo is a Swedish geneticist and Nobel Laureate who specialises in the field of evolutionary genetics. As one of the founders of paleogenetics, he has worked extensively on the Neanderthal genome.
Duncan.Hull, CC BY-SA 4.0, via Wikimedia Commons