Researchers studying the lakes of liquid water that are buried under Mars’ southern polar ice caps are beginning to question whether or not these structures are indeed liquid, as the radar data would indicate, due to the lack of a heat source that would prevent the water from freezing. Butread more

[Updated Feb. 19 to reflect Perseverance and Ingenuity’s successful landing] Mars became a fair bit busier this month, with no less than three missions—each from a different country—having arrived at the red planet over the past few weeks. The UAE’s Al-Amal and China’s Tianwen-1 spacecraft entered orbit earlier in February, and NASA’s Mars 2020read more