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Scientists Drilled The Bottom Of Great Blue Hole And Uncovered 5,700 Years Of History
The history of the Great Blue Hole in the Caribbean is being revealed by a 30-meter (98-foot) sediment core taken from the ...
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How to Build a Brick Fire Pit
Getting Started on Building an In-Ground Fire Pit: Advice From a Masonry Pro: Doug Montzka, of Montkza Concrete & Masonry ... Check the bottom of the hole with a level. Remove high spots in ...