Brian Greene welcomes the Internet to physics class with World Science U. Professor, author and string-theorist-about-town Brian Greene wants to expand the ways we learn about science. Greene, the ...

Discover how Einstein’s theory of special relativity reshaped physics by linking space, time, mass, and energy in a universe governed by the speed of light. Albert Einstein's 1905 theory of special ...

Special relativity has changed the way we think about time and the order of events. Einstein famously showed that two events can look simultaneous to one observer but not to another. In fact, it’s ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The theories of relativity by Albert Einstein revolutionized how the world thinks about space, ...

One hundred years ago this Wednesday, Albert Einstein gave the last of a series of presentations to the Prussian Academy of Sciences, which marks the official completion of his General Theory of ...

Flanked by celebrities including Seth McFarlane, Pharrell Williams and Hilary Swank, Mark Zuckerberg -- along with his wife, Pricilla Chan, Jack Ma, Yuri Milner, Sergey Brin and other collaborators -- ...

Imagine watching a spaceship zoom past at unimaginable speeds—so fast it is brushing up against the very limits of physics. What do you think it would look like? Scientists have long known that ...

Though there is an overwhelming amount of information floating around out there about the theory of relativity in all her guises, I was stumped last week when my eight year old nephew asked me to ...

A POPULAR exposition of the doctrine of Relativity and what it implies: for this the world has been crying since the astronomers announced that the stars had proved it true. Here is an excellent ...