It's another first for the Curiosity rover.
On Wednesday, the $2 billion space craft used Foursquare - a location-based mobile app - to check in on Mars.
While NASA astronaut and International Space Station Commander Doug Wheelock was the first to check in from space in 2010, this marks the first time Foursquare has been accessed from another planet.
"NASA is using Foursquare as a tool to share the rover's new locations while exploring Mars," said David Weaver, associate administrator for communications at NASA Headquarters, in a statement. "This will help to involve the public with the mission and give them a sense of the rover's travels through Gale Crater."
During its 23-month mission, Curiosity will use Foursquare to check in, snap photos and post comments about various locations on the Red Planet.
Users can earn a "Curiosity" badge when they check in to earthly locations that relate to science, technology, engineering and math.