In 20 years of studying Mars, that's the most bizarre rock I have ever seen. I cannot wait to have a microscopic image of this one...It is part of a Gigapan of Gale crater that you can see here: https://t.co/LxljtDHyIl pic.twitter.com/wHhn1ckqjL

— Nathalie A. Cabrol (@shasta721) April 10, 2023