April 20, 2026
posted on: Monday, April 20th, 2026, 1:01
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Kai Siegbahn image courtesy of Jan Collsiöö under the
Creative
Commons Attribution-Share Alike 3.0 Netherlands License. Karl Alex
Müller image courtesy of
Armin
Kübelbeck under the
Creative
Commons Attribution-ShareAlike 3.0 Unported License.
Today is the birthday of
- Kai Siegbahn (1918-2007).
- Karl Alexander Müller (1927-2023).
© 2026 Stefan Hollos and Richard Hollos