SpaceMars's atmosphere hosts metal layers that shouldn't exist Earth’s magnetic field provokes layers of iron and magnesium in the atmosphere, but Mars has no such field - so finding similar layers is a surprise 51¶¯Âþ
SpaceBackwards asteroid shares an orbit with Jupiter without crashing A rare retrograde asteroid has been spotted in Jupiter's orbital zone - and nudges from the giant planet may have kept it stable there for a million years 51¶¯Âþ