In 2022, a strange rock was found in the Sahara Desert, and now a new analysis reveals that it’s even more valuable to science than it first appeared. This fragment, weighing about two pounds, came from Mars’ crust. It was likely ejected by an impact, flying through space until it eventually reached Earth. The rock is one of the oldest known samples from our neighboring planet, estimated to be at least 4.1 billion years old. At that time, Earth was a young planet with intense geological activity, likely with oceans but no animals, plants, or any other complex life.