Alan Alda in Scientific American Frontiers

It will tackle challenges the world faces and is inspired by Chris Marker's iconic 1962 featurette La Jetée, about a time traveler who risks his life to change the course of history and save the future of humanity.

Playboy presents its most bodacious collection yet. We've gone back to your favorite videos to bring together 41 beautiful, buxom Playmates in scene after scene of purely endowed forms. Discover the beauty of Victoria Silvstedt (1997 Playmate of the Year) as she shares her generous gifts in a magical Cinderella fantasy. Travel to New Orleans with bombshell Anna-Marie Goddard (40th Anniversary Playmate) as she finds steamy passion in The Big Easy. Then, top things off with Hollywood starlet Jenny McCarthy (1994 Playmate of the Year). And our journey doesn't end there. You'll be seduced by these other stunning sirens as they take you through some dangerous curves: Laura Cover, Miss October 1998; Karen McDougal, 1998 Playmate of the Year; Brooke Richards, Miss December 1999; Shauna Sand, Miss May 1996; Jaime Bergman, 45th Anniversary Playmate; Stacy Sanches, 1996 Playmate of the Year; and Carrie Stevens, Miss June 1997. It's a curvaceous collection of the world's most bountiful beauties. Don't miss it.

Pulls back the curtain on the world's top brands, exposing the hidden tactics and covert strategies used to keep all of us locked in an endless cycle of buying, no matter the cost.

An investigation into abuse and missing children at an Indian residential school sparks a reckoning on the nearby Sugarcane Reserve.

Captures the band's electrifying 1964 US debut amid fan frenzy. With rare behind-the-scenes footage, it chronicles their unprecedented rise to global superstardom after performing on The Ed Sullivan Show to over 73 million viewers.

A group of male celebrities strip down to raise awareness for prostate, testicular, and colorectal cancer testing and research in this daring two-hour special.