Life is shaped by the environment in which it lives. When looking at an organism today, that relationship can be easily observed. But when all you’re left with is a fossil or rock, it can be tricky to identify the environment in which it formed, let alone the life forms that might have left their mark in that sample. Geobiologist Tanja Bosak now faces additional challenges as she searches for signs of early life on Mars. “Mars is different. There are a lot of factors to consider. It’s a great…
