When the Vikings 1 and 2 launched nobody knew what the Martian surface looked like.
The Martian day is 24 hours and 37 minutes.
But if the martian structures aren't of biological origin.
The Martian atmosphere is very thin. It's like our atmosphere at 100,000 feet.
A Martian year is equal 1 Earth year, 320 days, and 18.2 hours.
