Human skeleton found in Mexico cave

A prehistoric human skeleton has been found in a cave system that was flooded at the end of the last ice age 8,000 years ago, according to a cave-diving archaeologist on Mexico’s Caribbean coast.

Archaeologist Octavio del Rio said he and fellow diver Peter Broger saw the shattered skull and skeleton partly covered by sediment in a cave near where the Mexican government plans to build a high-speed tourist train through the jungle.

Given the distance from the cave entrance, the skeleton couldn’t have gotten there without modern diving equipment, so it must be over 8,000 years old, Del Rio said, referring to the era when rising sea levels flooded the caves.

Some of the oldest human remains in North America have been discovered in the sinkhole caves known as “cenotes” on the country’s Caribbean coast, and experts say some of those caves are threatened by the Mexican government’s Maya Train tourism project.

Del Rio stressed that the cave — whose location he did not reveal because of a fear the site could be looted or disturbed — was near where the government has cut down a swath of jungle to lay train tracks, and could be collapsed, contaminated or closed off by the building project and subsequent development.

Del Rio has been exploring the region for three decades, and in 2002, he participated in the discovery and cataloguing of remains known as The Woman of Naharon, who died around the same time, or perhaps earlier, than Naia — the nearly complete skeleton of a young woman who died around 13,000 years ago. It was discovered in a nearby cave system in 2007.

Activists say the heavy, high-speed rail project will fragment the coastal jungle and will run often above the fragile limestone caves, which — because they’re flooded, twisty and often incredibly narrow — can take decades to explore.

Caves along part of the coast already have been damaged by construction above them, with cement pilings used to support the weight above.

The 950-mile (1,500-kilometer) Maya Train line is meant to run in a rough loop around the Yucatan Peninsula, connecting beach resorts and archaeological sites.