Erwin Popper died in 1955.
Albert Popper was born in 1808.
Kuhn vs. Popper was created in 2004.
The duration of Professor Popper's Problem is 1.52 hours.
David Moniac died in 1836.
David Ironside died in 2005.
David H. Popper died in 2008.
David Popper was born in 1843.
David H. Popper was born in 1912.
Albert Popper died in 1889.
Julius Popper died in 1893.
Siegfried Popper died in 1933.
Hans Popper died in 1988.
Josef Popper-Lynkeus died in 1921.
Joachim Edler von Popper died in 1795.
Karl Popper died on September 17, 1994 at the age of 92.
He is still alive!
At 12 years old, he switched from violin to the cello (in 1855)