Researchers in Alabama are working with a team in Japan to develop “Marsbees.” Each Marsbee would be about the size of a bumblebee, but with bigger wings, which are necessary because of the thinner Martian atmosphere. They would travel in swarms, enabling these robotic creatures to fly into Mars’s atmosphere, survey the planet and take a wide range of readings, thanks to their mobility.
Source: NASA may use swarms of robotic bees to study Mars