Einstein’s claim that the speed of light is constant has survived more than a century of scrutiny—but scientists are still ...

City bus service could speed up with proven reforms, but Chicago politics and governance incentives block the changes that ...

The oldest fossilized remains of complex animals appear suddenly in the fossil record, and as if from nowhere, in rocks that ...

Albert Einstein was intrigued by a simple puzzle: an old car must travel 2 miles at an average of 30 mph. The twist? Its structure makes the solution impossible. Can you solve it?

Albert Einstein encountered a curious math puzzle involving an old car on a hill. The problem, seemingly simple, highlighted ...