Mars, all the evidence suggests, was once a habitable world. Oceans of liquid water may once have flooded the northern hemisphere, fed by networks of rivers and lakes stretching across the planet. The signs of this long-gone water are clear to see – but whether any life existed there, and how long that water survived, remains mysterious.
The Week in Space and Physics #4
The Week in Space and Physics #4
The Week in Space and Physics #4
Mars, all the evidence suggests, was once a habitable world. Oceans of liquid water may once have flooded the northern hemisphere, fed by networks of rivers and lakes stretching across the planet. The signs of this long-gone water are clear to see – but whether any life existed there, and how long that water survived, remains mysterious.