Crossposted by u/SpaceInstructor – linkage
Cavern below?
HiRISE 🛰
Mars has hidden depths hinted at by intriguing pits scattered around the planet. Some of these tantalizing windows may be entrances to underground caverns. If humans ever make it to Mars, they may want to consider hunkering down underground to protect themselves from space radiation.
This image from NASA’s Mars Reconnaissance Orbiter (MRO) in 2011 shows a hole on the slopes of the Pavonis Mons volcano. “Why there is a circular crater surrounding this hole remains a topic of speculation, as is the full extent of the underlying cavern,” NASA said in an image feature in 2020.
Source Article. I’ve teamed up with a few aerospace engineers friends on r/SpaceBrains to design a crowdsourced Mars colony. Check out our progress on discord and share your skills.
This photo is stunning and fires up the imagination to excellent levels. A favorite since it was new.
The University of Southern North Dakota at Hoople
Wossamotta U
The Mind of Albert Einstein:
↑ GIF by ArMaP
A Dillingham pilot says he spotted the creature while flying passengers to Manokotak last week. He calculated that its wingspan matched the length of a wing on his Cessna 207. That’s about 14 feet.
As of 28 July, 2021, there are 16,698!!! (wait, whAT?! 
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“It is no measure of health to be well adjusted to a profoundly sick society.”
← This sequence is cropped (and looped) from the last 10 frames of the video captured on Sol 6 by a camera on the lander for NASA’s Mars Pathfinder rover. Not enough pixels, but still, mighty impressive. This evidence was discovered -way- back in the day by 
