Water may be more widespread and recent on Mars than previously thought, based on observations of Martian sand dunes by China's rover.
The finding highlights new, potentially fertile areas in the warmer regions of Mars where conditions might be suitable for life to exist, though more study is needed.Friday's news comes days after mission leaders acknowledged that the Zhurong rover has yet to wake up since going into hibernation for the Martian winter nearly a year ago.
Their estimated date range for when the cracks and other dune features formed in Mars' Utopia Planitia, a vast plain in the northern hemisphere: sometime after 1.4 million to 400,000 years ago or even younger. "We think it could be a small amount ... no more than a film of water on the surface," co-author Xiaoguang Qin of the Institute of Geology and Geophysics said in an email.
Martian frost has been observed since NASA's 1970s Viking missions, but these light dustings of morning frost were thought to occur in certain locations under specific conditions.
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