The world’s oldest map of the night sky was amazingly accurate. ... The newly discovered coordinates represent only a small fraction of about 800 stars that Hipparchus is believed to have measured.

On December 7, 1941, Japanese forces attacked Pearl Harbor. Maps, both historic and newly created by National Geographic, yield new insights into the full scope of Japan's battle plans for the day ...

Research featuring Carr Center's Erica Chenoweth. Nonviolent protests are twice as likely to succeed as armed conflicts – and those engaging a threshold of 3.5% of the population have never failed to ...