What is Einstein's cosmological constant?

Einstein's cosmological constant resulted from a prejudice regarding how the universe should behave. Brian Greene explains why the great physicist edited his equations to include it. Subscribe to our YouTube Channel for all the latest from World Science U. Visit our Website: http://www.worldscienceu.com/ Like us on Facebook: https://www.facebook.com/worldscienceu Follow us on Twitter: https://twitter.com/worldscienceu