Mars

Mars is the 4th planet from the sun. It is the second-smallest at 6771 km. Temperatures there average out at -67 degrees Celcius. 130 years ago astronomers thought that Mars had living creatures called Martians. Mars rovers have confirmed that no Martians exist but there might be microbes. Mars also has a lot of craters. Its atmosphere is stripped away at a rate of 2kg/second due to its lack of magnetic field. Its day is 24 hours and 37 minutes and a year is 687 Earth days.