Deepest freshwater cave goes a lot deeper

[Still Waters]

Several years ago, a remotely operated vehicle was descending down into a freshwater cave system, hidden deep under the Czech Republic, when it came to an abrupt end.

Not the end of the cave, that is, but the end of its cable.

Now, new estimates taken from up at the surface suggest we'd need more than twice as much slack to get all the way to the bottom of this profound underwater cavern.

Using recent geophysical surveys of this national gem, known as the Hranice Abyss, scientists have traced the remarkable system of trench-like caves roughly a kilometre down (over half a mile down).

https://www.sciencealert.com/earth-s-deepest-known-freshwater-cave-is-actually-a-lot-deeper-than-we-thought

https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2020JF005663?