Building up the paper archive, we are coming across lots of cool stuff-
amazing the research that has gone on in the country. We found this
paper on black holes – a subset of the well-studied blue holes that just
happen to be black. The paper is pretty easy to follow if you want all
of the detail. Why black? Here is a quick summary with some answers,
and here is a more personal account of diving the holes. And check
out the old school video on a dive from 1999…..