The block universe concept suggests the past, present, and future coexist like a four-dimensional cube, with our sense of time flowing possibly being an illusion of entropy. Trump demands voting ...

Mathematicians have discovered a pattern known as the einstein tile — a single shape that can cover an infinite plane without ever repeating. Long thought impossible, the discovery rewrote what ...

McDonald’s sales got a lift from Snack Wraps in the third quarter. Same-store sales, or sales at locations open at least a year, rose 3.6% for the July-September period. That was slightly ahead of ...

Einstein's theories of relativity and gravitation; a selection of material from the essays submitted in the competition for the Eugene Higgins prize of $5,000, compiled and edited, and introductory ...