> Scientists discover a 'smiley face' on Mars - and it could contain signs of life
Scientists aren't sure exactly how big the smiley-face is, but it's one of 965 other salt deposits that have recently been catalogued on Mars' surface, which range in size from 1,000 to 10,000 feet wide.
https://www.dailymail.co.uk/sciencetech/article-13839031/Scientists-discover-smiley-face-Mars-contain-signs-life.html