'It blew my mind': Long-lost ice-age ecosystem, including fossils of lion-size armadillo and giant ground sloth, discovered in Texas 'water cave'

'It blew my mind': Long-lost ice-age ecosystem, including fossils of lion-size armadillo and giant ground sloth, discovered in Texas 'water cave'

Two researchers snorkeling in a subterranean stream in Texas discovered fossils from the Late Pleistocene epoch, revealing new details about what lived in this ancient ecosystem.