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Accelerating expansion of the universe
Perlmutter, Riess and Schmidt · 1990
Astronomy
Looking up, systematically, for four thousand years.
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Discovery of cosmic microwave background radiation
Penzias and Wilson
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Mass–energy equivalence
Albert Einstein · 1905
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On the Origin of Species
Charles Darwin
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Schrödinger's cat
Schrödinger didn’t invent quantum weirdness — he exposed its refusal to describe reality without cheating.
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String theory
String theory is not a theory of nature—it’s a laboratory for quantum gravity ideas that have no experimental anchor.