Every mark on a planet's surface details its history. Mars is long suspected of being home to signs of life, so its history is of particular interest to researchers. NASA's Mars Reconnaissance Orbiter (MRO) has found glass deposits sitting at the nadir of some impact craters on Mars. Previous scientific inquiries into impact glass on earth have been led by Peter Schultz from Brown University. While working on an expedition in Argentina he discovered ancient plant matter and organic material embedded in glass that was formed by an impact from millions of years ago. He proposed that the similar impacts could preserve signs of life on other planets. If they could isolate glass deposits on Mars, there is a chance they could detect and analyze the biosignatures.