Striking Dunes on Mars   History

Boast a Complex Formation

Scientists are tracing

 the movement of dust over Martian eons using a high-definition camera from orbit.

Scientists have been 

probing the Nili Patera region for many years now in an attempt to figure out how the dunes evolve over time.

A 2012 study, for example,

 showed remarkably swift movements across 105 days, during which some dunes traveled as much as 15 feet (4.5 meters).

 NASA reported in 2019. 

Barchan dunes are formed as the wind slowly moves sand grains up the slope of the dunes, creating small ripples on the slope,

Scientists are interested

 in sand dunes rather than the same material getting soaked in gamma radiation that might erase Martian biosignatures.

 It's thought

 these regions might be fruitful in the ongoing search for Martian life.

NASA Hubble's largest-ever  billion years

infrared image peers back 10