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i was today years old when i lesrned this thing

Started by billy rubin, June 18, 2021, 01:58:37 PM

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billy rubin

today i learned that there are no major rivers in the yucatan peninsula.

the bedrock is soluble limestone, full of caves and fissures and sinkholes, so all the drainage water flows under the surface

the sinkholes are called cenotes down there. here is a picture of one such, currently infested by that invasive species  Tourista americanus

more people have been to berlin than i have

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