Einstein's theory of general relativity views time similarly to width, height, and length. As such, both time and space can be curved by gravity. This effectively means that time is slower the closer ...

Fragments of energy may be the fundamental building blocks of the universe. The theory combines the ideas of particles and waves into a concentration of energy that flows throughout space and time.

What does it mean to be to space-time? The seemingly simple question gets to the essence of twentieth-century physics and has driven a hundred-year debate between philosophy and science. In Einstein’s ...

Space-time is the map of where and when events happen. A worldline is the record of every event that occurs throughout one’s life. The key question is whether the map — or all the events it draws ...

Here’s what you’ll learn when you read this story: Theoretical physicists believe math shows the possibilities of a fourth dimension, but there’s no actual evidence—yet. Albert Einstein believed space ...

What is space-time? Depending on how fast you're moving or how close you are to Earth's gravity can change the way time feels. Einstein’s theory of general relativity views time similarly to width, ...