Matthew Lachniet doesn't have your typical desk job. When he goes to work, he dons a head lamp and climbs into the deep recesses of some of the world's oldest caves. The UNLV geologist talks about his recent trip to a Mexican cave for National Geographic, and his groundbreaking find with a 2400-year-old stalagmite.
GUEST
Matthew Lachniet, Assoc Prof of Geology, UNLV