Add Yahoo as a preferred source to see more of our stories on Google. There’s a spot in the ocean that looks like a portal to another world. The Great Blue Hole, about 43 miles off the mainland of ...
HOUSTON, Dec. 29 (UPI) --Recent mineral testing in the Great Blue Hole, a massive underwater cave in Belize, suggests a lengthy drought lead to the collapse of the Mayans. From 300 to 700 CE, the ...
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