Anonymous ID: f480e3 April 24, 2019, 8:05 a.m. No.6296440   ๐Ÿ—„๏ธ.is ๐Ÿ”—kun

>>6295809

Magma is still only a theory.

The Kola Superdeep Borehole was just 9 inches in diameter, but at 40,230 feet (12,262 meters) reigns as the deepest hole. It took almost 20 years to reach that 7.5-mile depth

https://www.smithsonianmag.com/smithsonian-institution/ask-smithsonian-whats-deepest-hole-ever-dug-180954349/