Du Bois-Reymond delivered a speech to the Berlin Academy of Sciences enumerating seven "world riddles" or "shortcomings" of science:
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Du Bois-Reymond delivered a speech to the Berlin Academy of Sciences enumerating seven "world riddles" or "shortcomings" of science:
Text from Wikipedia, available under CC BY-SA 4.0.
Captured 2026-08-18 from Wikipedia. The archived copy is preserved so this citation survives link rot.