Time is not perfectly symmetrical—if it were, a video of real events would seem realistic whether played forward or backward. British astronomer Arthur Eddington explored time's perpetually forward motion with his "arrow of time" concept, developed around 1927. The arrow of time explains why humans have the sense that time is continuously moving from the known past to the unknown future. Though the future always seems to be something that one is moving toward, what is it really?
Back in the day
Sibling rivalry and political intrigue are a dangerous combination. In the case of George Plantagenet, Duke of Clarence, mixing the two brought about his early demise. As a young man, Clarence joined in a rebellion against his brother, King Edward IV. He soon had a change of heart and reconciled with Edward, but a few years later, he became involved in another plot against him. Clarence was then sent to the Tower of London, where he was secretly executed, allegedly by being drowned in what?
Born on a day like today
Tiffany was an American artist and designer best known for his work in stained glass. He studied painting with George Inness and later established an interior-decorating firm that came to be known as Tiffany Studios. The firm specialized in favrile glass work, characterized by iridescent colors and natural forms in the Art Nouveau style. After 1900, Tiffany's firm ventured into jewelry, pottery, and lamps, which became enormously popular in the 1960s and were widely imitated. Who was his father?