A Martian meteorite discovered 40 years ago delivers fresh evidence that life once existed on Mars. The scientists were able to determine the presence of organic matter in mineralised form such as different forms of bacteria within the meteorite

See the source article by following the link below:
A Martian meteorite discovered 40 years ago delivers fresh evidence that life once existed on Mars. The scientists were able to determine the presence of organic matter in mineralised form such as different forms of bacteria within the meteorite