Eric Walker added Humans were creating necklaces more than 120,000 years ago, a new study finds - CNN Style to a number of topics

Eric Walker added Paleoindian ochre mines in the submerged caves of the Yucatán Peninsula, Quintana Roo, Mexico | Science Advances to Mines and mining and Ochre

Eric Walker added Deep in since-flooded caves, researchers find evidence of America's first miners to Mines and mining and Ochre

Eric Walker added Canadian scuba diver in Mexico accidentally discovers vast, prehistoric industrial complex | National Post to Ochre

Eric Walker added a number of links to Ochre, and added Ochre to Minerals and gems

Eric Walker added a number of topics and a number of links to Minerals and gems, and added Minerals and gems to Geology, Natural resources and Atoms, molecules, chemicals, minerals, materials and compounds