Five Mars discoveries that transformed our understanding of the red planet

From ancient lakes to a stripped atmosphere, the planet has given up several secrets in 2015 thanks to the Curiosity rover and teams all around the Earth

With a rover trundling over red soil, a spacecraft diving through the atmosphere and teams at work all around the Earth, Mars has given up a string of secrets to Nasa in the last year. Here are some of the major discoveries of 2015.