This could be a bigger deal than you might think. Civilizations could have emerged earlier than we thought, and there may well be lost civilizations at the bottom of the Persian gulf or along now-submerged coastlines in the western hemisphere.

"Our 5+billion year Moon is a hollow structure, mainly titanium covered,"

Um, the lunar seismography would beg to differ...
And the retreat rate, from laser ranging, matches tidal dissipation, confirming the apparent mass.
{Sigh...}

"We tend to overestimate the effect of a technology in the short run and underestimate the effect in the long run." Amara's Law.

Okay, I promise to avoid ridiculing the brain dead ufomoronologists.

However, I need to correct the all too common misinterpretation of the concept of "civilization".

The most accurate translation of "civilization" is, " I am civilized because I own you as chattel. You get to grow the food and I get to eat it. They over there? Are barbarians because I have not yet enslaved them."

This all to common delusion that we can claim descent from royals and priests and other ancient forms of criminal behavior is frankly stupid!

For ten, (tens?) of thousands of years your ancestors and mine were slaves, serfs and menial servants. At best.

Unfortunately most of the accomplishments of our ancestors were very fragile and flammable. So, when was the last time you saw a tally-stick?

The monuments and artifacts that survive are the trophies of bloody-handed, egotistical ogres claiming to be demi-gods. Wanting to be one of those wielding the whip reveals ones dehumanization.

A question for Phys.org: why does your site attract so many complete whackdoodles (e.g., thomasct above)?

I would like to read their paper and check out the data when I get the chance. Though it seems to me that it's not such a new idea; David Rindos wrote of agriculture as a long term co-adaptive process in 1984. I always thought that this was a sensible approach, and that more research will flesh out the details.

A question for Phys.org: why does your site attract so many complete whackdoodles (e.g., thomasct above)?
@Nick Gotts
i am not a PO employee, but i can answer this: because they no longer moderate and the trolls have taken over the comments driving out any legitimate or scientific discourse

it's all about the money - they would loose $$ if they actually moderated per their guidelines

apparently it pays better to allow the trolls and pseudoscience cranks to flourish as PO can then pad their original poster count which then pushes them into a category of "high interest" allowing them to charge advertising more

of course, even a cursory look at said comments shows that there isn't interest so much as proselytizing pseudoscience idiots

Most of the lands that were dry are at some 200 to 400 feet lower sea level than we have now due to the immense amount of water locked up in the ice caps. There could be entire high tech civilizations as our own who, foolishly built mainly by the oceans, which is a very easy and economic way to travel yet when the water rises, land disappears, and so to countries and cultures along with them.

They are finding that the Indus Valley Civilization was actually a fleeing remnant that had moved from much lower lands, in a hurry, and had lost most of the tech and treasures that they had. The Indian Vedic Texts actually explain modern physics in such scary and definite terms that even Oppenheimer repeated the words of the texts "I am become Death The Destroyer of Worlds" because he had gotten some of his clues from vedic translations.

High Civilization is a cyclic thing, we ignorantly erase ourselves back to the ice and stone ages, repeatedly.

Pretty Bright Homo Sap, eh?