Losing It

S14 E01 • Tuesday, Jan 20, 2004 • Jan 20 • 1h

Don't Forget

S14 E02 • Tuesday, May 11, 2004 • May 11 • 1h

Future Car

S14 E03 • Wednesday, May 19, 2004 • May 19 • 1h

Hot Times in Alaska

S14 E04 • Tuesday, Jun 15, 2004 • Jun 15 • 1h

The Dark Side of the Universe

S14 E05 • Tuesday, Jun 22, 2004 • Jun 22 • 1h

Coming Into America

S14 E06 • Tuesday, Jul 20, 2004 • Jul 20 • 1h

“Coming into America” explores how prehistoric immigrants (host Alan Alda calls them “the true American pioneers”) might have arrived here---up to 20,000 years ago. Conventional wisdom has been that the “Clovis people” made their way down from Siberia about 13,000 years ago and spread out. But archaeologists interviewed point to artifacts in various places around the U.S. that are far older---and there's evidence that the ice sheets remained in place longer than previously thought---casting doubt on that theory.