Arizona Daily Sun11 小时Opinion
Coconino Voices: Protection of Grand Canyon monument is vital
As Coconino County Supervisors and appointed members to the Baaj Nwaavjo I’tah Kukveni Ancestral Footprints of the Grand ...
Live Science12 小时
Scientists identify tipping point for Greenland's ice sheet — and it's not far off
Greenland's ice sheet has been losing a staggering amount of ice at an accelerating rate. A tipping point could come by the ...