Too Close for Comfort
Photograph by Wes Skiles

U.S. biologist Tom Morris, wearing side-mounted scuba gear, creeps along a freshwater chamber beneath the sea—a space so narrow that his air tank bumps along the floor as his helmet scrapes the ceiling. Morris and Wes Skiles penetrated this undersea fountain passage for about a half mile, starting from the open sea and ending up beneath the coastline. The passageway was oriented, they discovered, along the fault line of the meteorite's impact rim.