 Viking lander biological experiments

The Viking landers, specifically Viking 1 and Viking 2, were two spacecraft sent to Mars by NASA in the 1970s, with the primary mission of conducting detailed investigations of the Martian surface and atmosphere. One of the most notable aspects of the Viking mission was its biological experiments, which aimed to detect signs of life on Mars. The Viking landers were equipped with several instruments designed to search for microbial life forms in the Martian soil.