AdvertisementThe Sac Actun cave system on Mexico's Yucatán Peninsula contains many wonders, from a 13,000-year-old skeleton to human artifacts and fossils of giant sloths. The underwater cave microbial communityThe cave system is a network of over 900 miles of connected caves that contain a mix of freshwater and saltwater. Caves flooded with coastal seawater had different microbes than The Pit, a deep cenote exposed to the surface, for example. For example, she noted that a planned train system from Cancún to the Yucatán Peninsula could affect the cave system. The potential for contamination is a problem anywhere there are caves, Osburn said.

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Persons: —, It's, Magdalena, Osburn, Natalie Gibb, Comamonadaceae Organizations: Service, Northwestern University, Microbiology, Reuters Locations: Cancún, In Kentucky