article_snippet.sent: Curiosity is the rover.
article_snippet.sent: It is not the first time It has spotted Curiosity, or indeed other rovers, on the surface - but It is the first time in 2015.
article_snippet.sent: The last time Curiosity was spotted from orbit was more than four months ago.
article_snippet.sent: Curiosity has now been on Mars for almost 1,000 days, having landed on 6 August 2012.