NASA’s Curiosity rover touched down on Mars in August 2012, and it’s been cruising round, capturing lasers at rocks, drilling into the bottom, and performing science experiments ever since. Simply final week, information got here out that Curiosity had discovered one thing salty. The rover is driving throughout Gale Crater, an historic Martian lake mattress that was as soon as full of water, and has found sulfate salts.
Scientists suppose that is doubtless on account of a really dry interval when water evaporated, leaving the salts behind. Our personal Earth stays moist as a result of we’ve an environment and a magnetic discipline, which retains our planet watery and wholesome so we are able to comfortably survive. However the story for Mars is a little more advanced. Billions of years in the past, Mars had an environment however it’s all the time had a reasonably small magnetic discipline, so the photo voltaic winds from the Solar stripped the environment away over time—leaving it the dry, arid planet we’ve grown to like.
This week we’re going to rove round on Mars alongside the largest, baddest, robotic on the purple planet.