Sinkholes form through both natural and human-made processes. <br />First 100 people to sign up will get three meals off their Blue Apron order free! Click here: This video is sponsored by Blue Apron. <br /><br />Most of us think about erosion on the surface of the earth, but erosion can occur in the subsurface as well. In fact, scientist and engineers have a very creative name for just such a process: internal erosion. If just the right factors come together in the subsurface, some very interesting things can occur, including sinkholes.<br /><br />-Patreon: <br />-Website: <br /><br />Memories by SNDR & Joey Shigrov is licensed under a Creative Commons Attribution License<br />Source: <br /><br />Tonic and Energy by Elexive is licensed under a Creative Commons Attribution License<br />Source: