More than 2 billion years ago, Mars may have had an ocean at low latitudes, in the same basin that now lies around its north pole (Illustration: Tyler Perron)
The case for an ancient ocean on Mars just got stronger.
For years scientists have been baffled by what look like shorelines on Mars. But, impossibly, sea level appears to have been 2.5 kilometres higher in some parts than in others – so many have doubted the ocean really existed. Now Taylor Perron of the University of California, Berkeley, and colleagues think that massive wobbles in the planet’s rotation may explain…
