re: Huge tunnels discovered in Brazil and Argentina that were not made by humans or geology

Imagine the caves looking like the ones created by the Krell on Forbidden Planet

You would think a discovery of this magnitude would include more than one picture in the article. Makes me skeptical.

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realize maybe this isn't a natural cut out cave, and it was likely carved out by a bear. Then i figured i should get the hell out of there b/c if i can break off these rocks that easily from inside this little cave, then it must not be that structurally sound and i don't want it collapsing on me.

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I love how this was your concern and not the potential bear that could show up any minute and find you in his den

It's one thing to burrow in soil as many animals do. It is entirely another thing to burrow in rock which many animals don't.

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These giant ground sloths, described in one paper as "a hamster the size of an elephant", were far removed from today's unhurried, tree-dwelling ones. They grew up to 4m long and walked on all fours, although research suggests some could stand and move bipedally. Almost 100 different species of sloths roamed the Americas between 15 million to 10,000 years ago alongside car-sized giant armadillos that also dug long tunnels through rocks in Brazil.

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