![A pink smiley face with meteor craters for eyes on the surface of mars](https://cdn.mos.cms.futurecdn.net/yrUVByoaPnroo8hovY7tPN-200-80.jpg)
Scientists spot ancient 'smiley face' on Mars — and it could contain signs of life
Newly released images of Mars reveal a "smiley" salt deposit on the Red Planet's surface. A related study suggests that similar deposits, which were left behind from ancient lakes, may be a good place to look for signs of former life on Mars.