00:01An entire underground city was abandoned,
00:05and its builders vanished without a trace.
00:10Scientists poured cement into a mysterious ant nest
00:14to uncover its hidden secrets.
00:20What they uncovered was astonishing.
00:24Thousands of chambers connected by massive underground tunnels.
00:30These tiny creatures even built underground farms,
00:34growing fungus to feed entire colony.
00:37Even more incredible, the nest had a natural ventilation system
00:42powered by nothing but wind.
00:46But every ant was gone.
00:48What made an entire colony abandon the city
00:51it had spent generations building?
