NASA's Mars rover Opportunity has broken the US record for distance driven on another planet.
Opportunity has been rolling around the Red Planet since Jan. 2004, and this week its odometer hit 22.220 miles (35.760 kilometers), pushing past the previous distance record set by the Apollo 17 moon rover in Dec. 1972.
Astronauts Gene Cernan and Harrison Schmitt drove the Apollo rover 22.210 miles (35.744 km).
If Opportunity can keep roving, it has a chance of breaking the off-planet driving record for all Earth vehicles. Currently, the Soviet Union's remote-controlled Lunokhod 2 rover is in the top spot, having traveled 23 miles (37 km) on the moon in 1973, according to Space.com.
Opportunity's current mission requires it to drive 1.4 miles (2.2 kilometers) to a location on Endeavour Crater called "Solander Point," so it's possible that it could surpass the record in a few weeks, according to Discovery News.