Did microbes build stromatolites on Mars?
Media playback is unsupported on your device
Video

Did microbes build stromatolites on Mars?

When Nasa's next rover gets to Mars in 2021, it will seek evidence of ancient life. A key target at the robot's landing site will be carbonate deposits. Mission team-member Briony Horgan, from Purdue University in Indiana, spoke with our science correspondent.

  • 14 Dec 2018