NASA scientists baffled as 'unusual' red circles appear on the surface of Mars

March 09, 2023

The latest pictures of the Red Planet show sand dunes, which are not unusual to see up there, but there are in the shape of perfect circles. READ MORE: Putin's scientists hunt for 'interstellar dust' in one million-year-old frozen lakeThe space agency's Mars Reconnaissance Orbiter (MRO) spotted the shapes as it studied how frost thaws at the end of Martian winter. NASA explains: "Sand dunes of many shapes and sizes are common on Mars. That quirky image was taken in December from a height of 251 km, with NASA saying: "A Bear on Mars? Ariz/SWNS)Mars Reconnaissance Orbiter has been orbiting and studying Mars since 2006.