Extras

Video thumbnail: NOVA Astronaut Walter Cunningham on the Historic Apollo 7 Mission

NOVA

Astronaut Walter Cunningham on the Historic Apollo 7 Mission

He discussed the first crewed Apollo mission, Apollo 7, with NOVA in 1998.

Astronaut Walter Cunningham on the Historic Apollo 7 Mission

Video thumbnail: NOVA Ancient Builders of the Amazon Preview

NOVA

Ancient Builders of the Amazon Preview

Archaeological discoveries reveal traces of ancient civilizations in the Amazon.

Ancient Builders of the Amazon Preview

Video thumbnail: NOVA Star Chasers of Senegal Preview

NOVA

Star Chasers of Senegal Preview

A visionary scientist investigates the deep history of astronomy in West Africa.

Star Chasers of Senegal Preview

Video thumbnail: NOVA These Trains Take Over for Their Drivers to Cut Travel Time

NOVA

These Trains Take Over for Their Drivers to Cut Travel Time

Can trains save their drivers time by changing direction on their own?

These Trains Take Over for Their Drivers to Cut Travel Time

Video thumbnail: NOVA London Super Tunnel Preview

NOVA

London Super Tunnel Preview

Thousands race to build Europe's biggest construction project–London's new railroad.

London Super Tunnel Preview

Video thumbnail: NOVA How Engineers Soundproof a New Underground Train Track

NOVA

How Engineers Soundproof a New Underground Train Track

Part of the new London track is directly below an iconic performing arts center.

How Engineers Soundproof a New Underground Train Track