"These were very different, co-existing environments in the same lake," said Joel Hurowitz of Stony Brook University in the US.

The game also illustrates how NASA's next Mars rover will use radar to search for underground water.

The nitrogen was detected in the form of nitric oxide, and could be released from breakdown of nitrates during heating.

Exposed layers on the lower portion of Mount Sharp are expected to hold evidence about dramatic changes in the environmental evolution of M...

Much of Curiosity's first year on Mars was spent investigating outcrops in a low area of Gale Crater called "Yellowknife Bay".

The unmanned spacecraft landed inside the Gale Crater on Aug 5, 2012 to start a multi-year mission to seek out areas where life could or ma...