Mars Rapid Formation Explains Its Small Size Relative to Earth
Mars developed in as little as two to four million years after the birth of the solar system, far more quickly than Earth, according to a new study published in the .
Mars Spirit rover was a robotic rover on Mars. active from 2004 to 2010.
Spirit was one of the twins rovers send to Mars. (twin rover Opportunity)
This rover went further then anyone could ever imagine. planned to travel just 600 meters (0.4 .