Local News

Don Davis/NASA

Scientists are dismissing a popular theory about mass extinction since the last ice age. The Younger Dryas Impact Hypothesis contends an asteroid hit Earth 13,000 years ago changing the climate instantly and dramatically. Scott Anderson, a paleoecologist at Northern Arizona University, is part of an international research team that looked for evidence to support this explanation, but didn't find any.


Rick Abasta / Navajo Nation

Navajo Nation President Russell Begaye says he opposes President Trump’s recent executive orders approving the construction of the Keystone XL and Dakota Access Pipelines. 

File photo

The Navajo Nation has declared a state emergency. Arizona Public Radio’s Ryan Heinsius reports, the recent wave of winter storms has created dangerous travel conditions throughout the reservation. 

  

Donald Bills, USGS

A federal agency says elevated levels of uranium found in a spring on the northern edge of Grand Canyon National Park is likely due to a natural source of the radioactive element and not related to an inactive mine.

U.S. Geological Survey Photographic Collection

Writer Wallace Stegner once claimed that exploration of the West by European-Americans began with Lewis and Clark and ended with Almon Thompson.


Pages