8/20/2026
Dark Matter Ā· dark-matter-energy

Einsteinā€™s biggest ā€œmistakeā€ came back ā€” and changed cosmology forever

Filed by Dr. Kai Vega
Einsteinā€™s biggest ā€œmistakeā€ came back ā€” and changed cosmology forever
Einsteinā€™s abandoned cosmological constant made a spectacular comeback when astronomers discovered that the universeā€™s expansion is accelerating. It now sits at the heart of our best cosmological modelā€”a model that works extraordinarily well, yet may still be wrong.
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Dr. Kai Vega
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Einsteinā€™s biggest ā€œmistakeā€ came back ā€” and changed cosmology forever ā€” Dark Matter