Time Shelter

Time Shelter

At one point they tried to calculate when time began, when exactly the earth had been created. In the mid–seventeenth century, the Irish bishop Ussher calculated not only the exact year, but also a starting date: October 22, 4,004 years before Christ. It was a...
Seven Brief Lessons on Physics

Seven Brief Lessons on Physics

The Most Beautiful of Theories In his youth Albert Einstein spent a year loafing aimlessly. You don’t get anywhere by not “wasting” time—something, unfortunately, that the parents of teenagers tend frequently to forget. He was in Pavia. He had joined his family,...