Portside

Go is often viewed as a game computers could never play. Now AlphaGo has proven the naysayers wrong, beating a world-class Go player for the first time. 

Emmylou Harris, Rodney Crowell and three members of Glory Band perform a live version of Rodney's "Till I Can Gain Control Again" from a show in July 2014

The true story of a poor, largely self-educated Indian genius who crashed the elite world of mathematics. Stars Dev Patel as Srinivasa Ramanujan.

Donald Trump may have more in common with fascism founder Benito Mussolini than he realizes.

Seth Meyers takes a closer look at the Bernie Sanders presidential campaign.

David Kaplan explores the best ways to search for alien life on distant planets.

Is Donald Trump really a truth teller? No, he views the truth the way a lemur views the Supreme Court vacancy -- he really doesn't care. And other truths about Donald Trump.

Bob Marley's brilliant call to arms, one of the most covered songs ever, is here performed by a global collaboration of grassroots artists.

See just how many times the Big Lebowski needs to tell Donny to "Shut the f**k up." 

What are gravitational waves, and why does it matter that we've seen them? Brian Greene stops by to demonstrate an exciting new scientific discovery.