Get Pelted Every Day With Particles That Confirm Special Relativity

Go outside and you will be showered, every day, with proof of the theory of special relativity. This proof comes in the form of muons, so you won't actually see it, but we'll tell you why the presence of these particles proves Einstein right. » 11/04/14 12:40pm 11/04/14 12:40pm

What Time is It in the Universe?

Check your watch. What time is it? But wait, you've actually been moving and accelerating, and according to Einstein, everything's relative. So what time is it really? It all depends… » 8/30/14 9:00am 8/30/14 9:00am

Do yourself a favor and read Einstein's paper on special relativity

One of the most famous concepts in science was introduced in a paper with the uninspiring title, "On the Electrodynamics of Moving Bodies." A little reading can give you the basics of relativity, right from the source. » 3/17/14 11:34am 3/17/14 11:34am

Relativity goes underwater with Supplee's Paradox

Too often relativity is confined to space ships and interplanetary travel. It's time to dive and see what weird ideas relativity can bring to us from beneath the sea. » 9/13/13 6:40am 9/13/13 6:40am

We just used the theory of relativity to discover a new planet

In a manner of speaking, Albert Einstein just helped an international team of astronomers find a hot Jupiter that’s 2,000 light-years away. It’s the first time in history that the theory of relativity was used to locate another planet. » 5/14/13 9:40am 5/14/13 9:40am

It's official: Neutrinos can't go faster than the speed of light after…

Foolish humans. Such hubris to think that we could dethrone Einsteinian special relativity, by virtue of a single experiment. Now it's official: the notion that neutrinos could travel faster than the speed of light really was the result of a "faulty kit". » 6/08/12 5:00pm 6/08/12 5:00pm

How Einstein Came Up With Special Relativity

Time dilation. Length contraction. The fact that time moves faster at your face than it does at your feet. These are all experimentally verified consequences of the Special Theory of Relativity, proposed in 1905 by Albert Einstein. But the theory also helped explain one of the most nagging questions of modern… » 3/19/12 8:20am 3/19/12 8:20am

What would the world look like if you approached the speed of light?

This truly awesome video has the answers to that question. It imagines a trip down a desert highway at speeds approaching light, and then shows all the weird and wonderful optical effects the theory of special relativity says we'd experience. » 10/18/11 11:20am 10/18/11 11:20am