Heather, the chair of medieval history at King's College London, is the author of Christendom: The Triumph of Religion, AD 300-1300 For the first millennium of Christianity’s existence, western ...

Now that we’re done celebrating Presidents Day, and by that I mean enjoying a day off, let’s consider some of George Washington’s contributions. Father of our country, leader of t… ...

Drawing of the bottom section of De Dondi’s astronomical clock. Giovanni de Dondi. These weren’t the accurate clocks we see today – they probably kept time to within 15-30 minutes a day.

For permanent daylight saving time to become a reality, the Sunshine Protection Act will need to pass through the House of Representatives and be signed into law by President Joe Biden. Whether or not ...