Morgan O’Hanlon: As you’re driving through West Texas and through Balmorhea, this kind of big open desert, you get to the Phantom Springs Cave and it’s this tiny little narrow crevice.
He had spent decades rewriting the rules of deep diving, surviving narcosis, near-death rescues, and caves no human had ever seen. But at 305 meters, in a sinkhole so deep it swallowed light, the ...