During periods of lower sea level, when caves were dry, stalagmites and stalactites ... geologic structure of the inland blue holes—deep, dark, sheltered, with little tidal flow—specialized ...

Dark Star’s passages are deep underground, yet many are 10,000 feet above sea level. The thin air at that altitude ups the physical challenge of negotiating the cave. Two days later I am at the ...

Previous caves found on the moon do not feature any entry points, they added. The hollowed passage lies beneath a pit about 100 metres wide in the Sea of Tranquillity, a dark region on the near ...

There are caves all over the planet, but only a few have been explored. These dark spaces are sheltered from the weather ... However, what is really interesting is there aren't any blind fish in the ...