At first glance, Imus’ “The Essential Geography of the United States of America” may look like any other U.S. wall map. It’s about 4 feet by 3 feet. It uses a standard, two-dimensional ...

The U.S. Coast Survey map calculated the number of slaves in each county in the United States in 1860. Library of Congress. In September of 1861, the U.S. Coast Survey published a large map ...

The U.S. population is spread out among 3.8 million square miles across 50 states, yet nearly one-third of Americans live in just three states: California, Texas and New York. New York City alone ...

USGS researchers have unveiled the first map of prospective locations for hydrogen gas in the contiguous United States — and there's a lot more than they previously thought.