- johnmackinssa
Mars Canyon vs. Grand Canyon
It's nearly 10 times as long as the Grand Canyon, and three times as deep. But how did it form on Mars?
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NASA SOLAR SYSTEM AMBASSADORS - Southern Illinois
Nationwide volunteers who share the excitement of NASA's space exploration missions and recent discoveries with their communities
Comments and views expressed by Solar System Ambassadors are our own and in no way reflect the opinions or policies of the various individuals or agencies for whom we volunteer.
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