In the vast and lonely Arizona desert about 50 miles south of Las Vegas, tourists who took a wrong turn stumbled across a woman's naked and bloodied body on Dec. 12, 1989. Two days later and nearly ...

Carbon dioxide levels in the Earth’s atmosphere hit nearly 420 parts per million in 2021 — a level not seen in around four million years, since the mid-Pliocene Epoch, long before our own species ...