Congrats to all the highly-deserving winners of the 2021 ICTP Dirac Medal! We're proud to see the work of our colle… https://t.co/4K4T7WpZuo
A mathematical device used by Einstein to keep the Universe from falling in on itself. He later called this his "greatest blunder", because it kept him from predicting the expansion of the Universe. Astrophysicists now believe there may be a use for the cosmological constant.