Einstein’s “Biggest Blunder” | Adam Riess

Discovering dark energy wasn’t just thrilling—it was terrifying. Nobel Prize Winner Adam Riess explains the nerve-wracking process behind confirming that the universe’s expansion is accelerating and why Einstein’s so-called “biggest blunder” turned out to be anything but.For more, check out the extended interview with Adam RiessLearn more about NOVA and subscribe to our YouTube channel.