The Mars Reconnaissance Orbiter’s High Resolution Imaging Science Experiment, or HiRISE, captured this view of a recent impact crater on the Red Planet. According to a NASA description, “the new crater and its ejecta have distinctive color patterns. Once the colors have faded in a few decades, this new crater will still be distinctive compared to the secondaries by having a deeper cavity compared to its diameter.” North is up.
Gigantic groundwater outbursts created the largest flood channels in the solar system on Mars, 3.2 billion years ago. For many years it was thought that this was caused by the release of water from a global water table, but research just published reveals regional deposits of sediment and ice emplaced 450 million years earlier to be the source.