Modern Marvels

Season 10 Episode 58

ET Tech

0
Aired Wednesday 10:00 PM Nov 25, 2003 on The History Channel

Trivia

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  • Trivia

    • Radio and TV signals, our beacons to ETs, travel at the speed of light. They reach Mars in as little as four and a half minutes and the nearest star, besides our Sun, in four years.

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