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 latest solar flare follows an M-class one, the second-highest on the scale, that occurred days earlier on June 15. It caused a shortwave radio blackout across North America, with a loss of signal ...

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 ...

In total, the United States spans over 3.5 million square miles, according to States Symbols USA. The fifty states are home to millions of people, with California being the state with the largest ...