Video of the Week - Mars, Four Billion Years Ago?
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We are all familiar with the rocky, red surface of present day Mars - After all, that is why it is nicknamed the 'Red Planet'. And while It's definitely not a place most of us would want to live on in its present state, what if it had been filled with huge lakes, lush green fields and giant cliffs? Just like . . . Earth?
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지금 학습 시작하기댓글 338개
- buddylolcodi11년 이상i want to go to mar 4 billon years
- gogo11년 이상wow that is so cool i wonder if mars was still like this would humans inhabit it
- 12311년 이상Cool
- Matt11년 이상WOW this is cool
- ori11년 이상I do not understand how it changed.
- JACK11년 이상I don't understand why they would go out there.
fabian1111년 이상cool
bryan511년 이상awesome
sv12311년 이상Neat- Arianna11년 이상wow. I cannot believe it. The "Red Planet" used to look somewhat like Earth. Next NASA might find out if it is livable,or if we might be able to adapt to it.