A team of scientists explore a Mexican cave filled with giant crystals; some of the largest ever discovered. With temperatures near 120 degrees and over 80 percent humidity, the cave is one of the deadliest environments on earth.
A team of scientists explore a Mexican cave filled with giant crystals; some of the largest ever discovered. With temperatures near 120 degrees and over 80 percent humidity, the cave is one of the deadliest environments on earth.
