A Plastic Wrapper
Soon after arriving on the Red Planet, Curiosity found an apparent piece of plastic wrap on the surface, which turned out to be… plastic wrap. After some head-scratching moments at NASA, the Curiosity team concluded that the plastic fragment came from the rover itself, specifically a piece of wrap from a cable that likely came loose during landing.
In 2018, another plastic-like object was seen on Mars, but it turned out to be a thin flake of rock.
