This week's question:
How long does it take Mars to go around, or orbit, the Sun? Is it:
a) 152 days
b) 687 days
c) 2024 days
Listen to the audio
Monday, September 17, 2012
Driving on Mars
This week's question:
How long does it take Mars to go around, or orbit, the Sun? Is it:
a) 152 days
b) 687 days
c) 2024 days
Listen to the audio
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