By Dr. Adrian Brown
Planetary Research Scientist at the Carl Sagan Center for the Study of Life in the Universe, SETI Institute
The last two months have witnessed several extremely important events with respect to future Mars Exploration. The first two revolved around the rover "Spirit." The other two are a new mission to Mars and a possible road for humans to Mars.
It was previously thought that there was an abundant water resource on Mars 3 billion years ago. However, it was recently discovered that water was present significantly later.
Water flowed on Mars for longer than we thought it-online.co.za - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from it-online.co.za Daily Mail and Mail on Sunday newspapers.