Hexagon-tiled rock newly uncovered on Mars suggests that the Red Planet underwent a repeated cycle of wet and dry spells for up to millions of years that could have supported the emergence of life, a new study finds.
Although Mars is now cold and dry, researchers have for decades found evidence suggesting that the planet's surface was once covered with rivers, streams, ponds, lakes and perhaps even seas and oceans. Since there is life virtually everywhere on Earth where there is water, these ancient signs of water on the Red Planet raise the possibility that Mars was once home to life — and might host it still.
