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originally posted by: havok
There are plenty of Earth formations that include right angles and straight lines.
Here are a few good examples:
Also, the Cave of Crystal Giants is fascinating:
Here is an article on that specific cave:
So, it's not like there aren't large crystalline structures here on Earth, or large rock formations that form straight lines and right angles. Because there are many examples.
I remain skeptical that they are made from other life forms.
But keep up the search!