The world we think of as the earth is a very small fragment of its true extent. Vegetation and oceans sit at the top, a thin layer over a deep bed of solid rock that itself becomes molten and penetrates thousands of kilometers further down. Rarely do we get to experience this subterranean world, though…

It rains a lot in the Luquillo mountains – more than three meters each year. The earth’s gobal circulation means that clouds blow in from the east, are pushed again the mountains, rise up, cool down, and then lose the capacity to hold water vapor – causing precipitation. What that means is that a lot…