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Those well-intending workers, especially theorists, who have viewed hungrily the mixed valence problem, but have not yet made the bold leap, might be comforted to learn that the …

Hurricanes Irma and Maria stressed and destroyed significant areas of Puerto Rico's natural resources, many of which were already strained by anthropogenic effects. This report …

With hikes in Glacier and Waterton varying from half-hour strolls to full-day adventures, this guidebook is for everyone, including families.

When trappers and fur traders first encountered the Arikara Indians, they saw a settled and well-organized people who could be firm friends or fearsome enemies. Until the late …

Professional writer and landscape photographer Tim Truby has gathered all the photo-related information beginners and enthusiasts need to create their best images at Zion and Bryce …

The 1860 Expedition of the Thousand, in which a group of volunteers led by Giuseppe Garibaldi sailed from Quarto, near Genoa, landing on the west coast of Sicily and advancing to …

Sequoia and Kings Canyon National Parks, situated in California's rugged Sierra Nevada, boast some of the most spectacular landscapes on the continent: towering groves of giant …