morse code

morse code

Martian Morse Code

1w ago
SOURCE  

Description

These dark dunes are influenced by local topography. The shape and orientation of dunes can usually tell us about wind direction, but in this image, the dune-forms are very complex, so it's difficult to know the wind direction. (Audio by Tre Gibbs. Black and white images are less than 5 km across; enhanced color images, 1 km across.) uahirise.org/ESP_044675_2580