Kansas Geological Survey

If you want to learn more about the Ogallala Aquifer and the people working to slow its depletion, several organizations track the crisis directly.

The Kansas Geological Survey publishes ongoing water level monitoring data for the entire state, including the specific groundwater management districts discussed in this episode.

Groundwater management districts across Nebraska, Texas, and Colorado publish public information on local conservation programs, including local enhanced management areas like the one described earlier.

The Ogallala Water Coordinated Agriculture Project, a partnership of researchers across six states, publishes ongoing research into sustainable irrigation practices for farmers hoping to reduce their own water use.

The frigid peak when vast ice sheets locked up much of the planet's water between roughly 25,000 and 19,000 years ago.

Writing and Current Opinion in Genetics and Development, Bethany Potter of the Kansas Geological Survey, Savannah Hay of the University of Kansas and their colleagues Jennifer Raff and Amy Singh weighed three competing models against the genomic record.

A pre-LGM entry more than 25,000 years ago, a migration between 20,000 and 14,000 years ago, and a later arrival after 14,000 years, the old Clovis first position that dominated textbooks for decades.

The genetic evidence, they argue, fits the middle scenario.