Conscious Choice cover

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.

 
Conscious Choice: The origins of slavery in America and why it matters today and for our future in outer space, is a riveting page-turning story that documents how slavery slowly became pervasive in the southern British colonies of North America, colonies founded by a people and culture that not only did not allow slavery but in every way were hostile to the practice.  
Conscious Choice does more however. In telling the tragic history of the Virginia colony and the rise of slavery there, Zimmerman lays out the proper path for creating healthy societies in places like the Moon and Mars.

 

“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.


Cliff collapse on Mars

Cliff collapse on Mars
Click for full image.

Cool image time! The photograph to the left, rotated, cropped, and reduced to post here, was found in the August image release of the high resolution camera on Mars Reconnaissance Orbiter (MRO).

This was an uncaptioned image, with a title “Cataract and Grooves in Kasei Valles.” Kasei Valles is the giant canyon north of Marineris Valles. Though it is not as well known or maybe as dramatic, it is about as long and vast as its more famous southern canyon. It also has some very intriguing features, including what I consider to so far be the pit on Mars with the highest priority for exploration.

The image on the right shows the result when a giant section of this cliff face broke off and collapsed into the canyon. It also shows that the collapse occurred a long time ago. Not only are there newer craters on the collapse debris, the breakdown at the cliff base looks well eroded, as if many eons have passed since it piled up there.

When this section broke off however it was a very big event. The width of the collapse is about a mile across, with its depth about 600 feet. The height of the cliff is approximately 3000 feet, give or take a few hundred feet. Thus the chunk that broke off was about 600 feet wide, 5,000 feet long, and about 3,000 feet high. That’s one very big rock.

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