Einstein’s biggest “mistake” came back — and changed cosmology forever

Einstein’s 'biggest mistake' is back as the universe’s expansion acceleratesA new cosmic mystery has revived Albert Einstein’s “biggest mistake” after astronomers discovered that the universe’s expansion is accelerating.Today, the once-discarded concept sits at

Einstein’s abandoned cosmological constant made a spectacular comeback when astronomers discovered that the universe’s expansion is accelerating. It now sits at the heart of our best cosmological model—a model that works extraordinarily well, yet may still be wrong.