“The law of causality is no longer applied in quantum theory and the law of conservation of matter is no longer true for the elementary particles.”

—  Werner Heisenberg

Physics and Philosophy (1958)
Context: The law of causality is no longer applied in quantum theory and the law of conservation of matter is no longer true for the elementary particles. Obviously Kant could not have foreseen the new discoveries, but since he was convinced that his concepts would be "the basis of any future metaphysics that can be called science" it is interesting to see where his arguments have been wrong.

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Werner Heisenberg 42
German theoretical physicist 1901–1976

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