“The discovery of abundant siderite in Gale Crater represents both a surprising and important breakthrough in our understanding of the geologic and atmospheric evolution of Mars,” Benjamin Tutolo, associate professor at the University of Calgary, Canada, and lead author of the paper, said in a statement.

A team of scientists has uncovered new details about Mars’ Jezero Crater using the Perseverance rover's cutting-edge technology. Their research reveals a complex volcanic history marked by diverse iron-rich rocks,

NASA's Curiosity Rover has discovered long carbon chains on Mars. On Earth, molecules like these are overwhelmingly produced by biological processes.