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Extras

Video thumbnail: NOVA Early Earth Bombarded By Comets

NOVA

Early Earth Bombarded By Comets

Comets carrying chemicals necessary for life may have come to Earth billions of years ago.

Early Earth Bombarded By Comets

Video thumbnail: NOVA Hunting Planets

NOVA

Hunting Planets

NASA’s Kepler mission lets us search for planets orbiting stars outside our solar system.

Hunting Planets

Video thumbnail: NOVA Is There Life on Enceladus?

NOVA

Is There Life on Enceladus?

Scientists discover evidence for the key ingredients for life on Saturn's moon Enceladus.

Is There Life on Enceladus?

Video thumbnail: NOVA Finding Life Beyond Earth Preview

NOVA

Finding Life Beyond Earth Preview

Scientists are on the verge of answering one of the greatest questions: Are we alone?

Finding Life Beyond Earth Preview

Video thumbnail: NOVA An Interview with Sally Ride

NOVA

An Interview with Sally Ride

Watch an uncut interview with the late astronaut, conducted at NASA in 1984.

An Interview with Sally Ride

Video thumbnail: NOVA The Mars Rover, "Curiosity"

NOVA

The Mars Rover, "Curiosity"

NASA is sending a robotic rover called "Curiosity" to find out if there is life on Mars.

The Mars Rover, "Curiosity"

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