NASA's Curiosity rover touched down on Mars in August 2012, and it's been exploring the Red Planet all that time. There have been some amazing discoveries and it's travelled over 30km but it has just made the most scientifically significant discovery of its 12 year career, and did it simply by running over a rock! One of Curiosity's wheels crushed a rock. It had looked just like any other orange martian rock, but when it shattered under Curiosity's wheels, it revealed breathtaking yellowish green crystals inside, that turned out to pure sulphur. Unheard of on the Red Planet. Let's check it out!Follow Cosmic Coffee Time on X for some special content      X.com/CosmicCoffTimeYou can request a topic for the show! Or even just say hi!We'd love to hear from you.Email us!cosmiccoffeetime@gmail.com