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The Universe Is Racing Apart. We May Finally Know Why.
PBS Space Time · 20:55
993,224 views · 58,251 likes · Feb 19, 2026
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We've known that the universe is expanding since 1929, and that its expansion is accelerating since 1998. The culprit behind the acceleration is unknown, so we live with a stand-in term "dark energy". Our modern cosmological model assumes that dark energy has a constant density--always t…
Get a special 35% discount on an annual digital subscription to The Economist at https://www.economist.com/PBS
We've known that the universe is expanding since 1929, and that its expansion is accelerating since 1998. The culprit behind the acceleration is unknown, so we live with a stand-in term "dark energy". Our modern cosmological model assumes that dark energy has a constant density--always t…
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