【#Tech24H】Using lasers, infrared spectrometers, and X-ray spectrometers aboard the Perseverance rover, a team of scientists from Purdue University analyzed 126 sedimentary rock samples and eight rock surfaces in Neretva Vallis, revealing the chemical composition of ancient Mars for the first time. Notably, the chemical composition and structure of nickel-rich iron sulfide show similarities to those of pyrite, an iron sulfide mineral found in Earth’s sedimentary rocks. This discovery provides insights into the chemical reactions that occurred on early Mars.