From the press release: In this ground-breaking new history of early America, historian Robert Zimmerman not only exposes the lie behind The New York Times 1619 Project that falsely claims slavery is central to the history of the United States, he also provides profound lessons about the nature of human societies, lessons important for Americans today as well as for all future settlers on Mars and elsewhere in space.
“Zimmerman’s ground-breaking history provides every future generation the basic framework for establishing new societies on other worlds. We would be wise to heed what he says.” —Robert Zubrin, founder of founder of the Mars Society.
Available everywhere for $3.99 (before discount) at Amazon, Barnes & Noble, and all ebook vendors, or direct from the ebook publisher, ebookit. And if you buy it from ebookit you don't support the big tech companies and I get a bigger cut much sooner.
Cool image time! The photo to the right, rotated and cropped to post here, was taken on November 18, 2021 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). Labeled merely as “Danielson Crater Outcrops,” it shows us a perfect example of the strangeness and sometimes very forbidding terrain of Mars.
We are looking at the outcrop tops of many tilted layers, worn into curves semicircles with the convex side all pointing to the southwest. In the hollowed concave-side, dust and sand have accumulated and been trapped, sometimes forming small ripple dunes when there is enough space for the wind to get inside, as seen in the picture’s lower right.
Danielson Crater is 41 miles in diameter. The overview map below provides the context.
The white dot marks this photo’s location, in the southeast quadrant of the crater floor. Scientists have used MRO to take many high resolution images of this crater interior because the pictures reveal many such tilted layers.
At present scientists have no real understanding of what caused these layers. They could have been put down either by the Martian atmospheric climate cycles, where the widely changing tilt of the planet caused many swings over many eons. Or this crater floor might have once been under water, either filled like a lake or at the bottom of a larger sea. No one knows, though scientists have found evidence suggesting an inland sea might have once existed to the west in the outlet from Valles Marineris.
What we likely do know is that the impact that created the crater occurred after the layers were created, meaning that they are very old. We also can see that travel in these badlands is likely to be very difficult for any ground-based vehicle. Exploration will likely only be practical with some form of helicopter.
Below is a beautiful 3d fly-over animation using MRO photos. It makes it very easy to see the layers and their tilted nature.
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