Scientists Born April 21 | Famous Birthdays

By Ava Richardson | Published January 10, 2026

Cover

Scientists Born April 21

John Muir (1838-1914)

Paul Karrer (1889-1971)

Phillip Law (1912-2010)

Top April 21 Birthdays Most Popular Scientists

You Might Also Like

Willem Verbeeck net worth, income and estimated earnings of Youtuber channel

My Life With the Walter Boys season 2 rumored to start filming in spring 2024

20 memes to celebrate Parks and Recreation before it leaves Netflix

14 Best Beaches in the U.S. Virgin Islands