Deep beneath the surface of New Mexico, explorers have found a remarkable pool 700ft underground in Lechuguilla Cave at Carlsbad Caverns National Park. The eerie blue pool, described as a 'wondrous sight,' had never been seen by humans before and appeared to be flowing with milk.
Optical Illusion, Not Magic Milk
Although the water looks murky with a creamy tint, it is actually crystal clear, creating an optical illusion. The pool was surrounded by white frosted rock. Expedition leader Max Wisshak said the water is thought to have come from ancient rainwater that seeped through the limestone roof.
Discovery in 2019
The discovery occurred 700ft below Carlsbad Caverns in Lechuguilla Cave, one of the world's largest and deepest known caves. A team of specialised explorers received permission to explore beyond a body of water known as the Lake of Liquid Sky, first discovered in 1993. Park staff announced the find, noting: 'Exploration in caves sometimes yields small yet wondrous sights. This cave pool, found in Lechuguilla Cave, appears to be completely pristine.'
Scientific Importance
Carlsbad Caverns' Rodney Horrocks said: 'This pool has been isolated for hundreds of thousands of years and had never seen light before that day.' Mr Wisshak added: 'Such untouched pools are scientifically important because water samples are relatively free of contaminants and the microbial organisms that may live in those pools are only those that belong there.' He explained that contamination from the surface is minimal since Lechuguilla Cave is in a well-protected wilderness area. 'A newly discovered pool in Lechuguilla Cave is about as pristine as it gets.'
The edges beneath the pool appear to be 'pool fingers,' which could be bacterial colonies that have evolved entirely without human presence. Carlsbad Caverns continues to reveal new finds; in 2012, explorers found a network of connecting tunnels leading to a giant room nearly 600ft long and 150ft high.
