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Space & Astronomy

These weird sand dunes on Mars are 'almost perfectly circular'

By T.K. Randall
March 15, 2023 · Comment icon 9 comments

These are some strange looking sand dunes. Image Credit: NASA / JPL-Caltech / UArizona
Scientists have been left scratching their heads over images of a peculiar phenomenon on the surface of Mars.
Like giant dark-colored chocolate buttons, these dunes - which were captured by the High Resolution Imaging Science Experiment (HiRISE) camera system onboard NASA's Mars Reconnaissance Orbiter (MRO) spacecraft - look like nothing ever seen on the Red Planet before.

"Sand dunes of many shapes and sizes are common on Mars," a press release by the University of Arizona states. "In this example, the dunes are almost perfectly circular, which is unusual."
"They are still slightly asymmetrical, with steep slip faces on the south ends."

"This indicates that sand generally moves to the south, but the winds may be variable."

Exactly how these particular dunes came to form, however, currently remains a complete mystery.

Source: Independent | Comments (9)

Recent comments on this story
Comment icon #1 Posted by Ell 13 days ago
Fairy circles? Dark ice? Dark rock? Dunes evaporated?
Comment icon #2 Posted by Grim Reaper 6 13 days ago
I donít know why they donít send a Rover to check it out that would solve the issue once and for all!
Comment icon #3 Posted by Sir Wearer of Hats 13 days ago
Say it with me folksÖ.. Iím not saying itís aliensÖ but itís aliens.†
Comment icon #4 Posted by turtleinawholeshell 13 days ago
Interesting how one picture the "holes" do indeed look like holes. Most similarly like light through water on shallow beach sand. but the other picture the "holes" look like something sitting on top of coral-like patterns. Or my eyes are just Derping. I know scale invariance is a thing but its so difficult to get any sense of reference from these pictures † Dont really have a point, just observing
Comment icon #5 Posted by Grim Reaper 6 13 days ago
Well itís a very good observation, I also thought about it too! Thanks for your post and welcome to the forum!
Comment icon #6 Posted by the13bats 13 days ago
Meh, just more bigfoot pics.
Comment icon #7 Posted by Skulduggery 6 days ago
That's where the giant worms come out at night.
Comment icon #8 Posted by newbloodmoon 6 days ago
Maybe mars had a bad case of acne during its teen years? Either that or our rovers gave mars small pox, humans as a whole are kinda a holey that way.
Comment icon #9 Posted by qxcontinuum 5 days ago
To me they look like tubes , planted in the sand ...

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