Article
Problems of gravity
Why (some) physicists want to modify Einstein's general theory of relativity.
Content about “ gravity
”
Article
What is space?
Space is the stage on which physics happens. It's unaffected by what happens in it and it would still be there if everything in it disappeared. This is how we learn to think about space at school. But the idea is as novel as it is out-dated.
News story
What Planck saw
Cosmologists gathered in the Netherlands last week to discuss a new view of the Universe. The Universe as seen by Planck was an international conference to discuss the recently released scientific results from the Planck satellite, including two particularly striking snapshots of the early Universe.
Article
From planets to universes (part I)
This is the first part of the lecture given by Astronomer Royal Martin Rees at Stephen Hawking's birthday symposium.
Article
What is time?
Everyone knows what time is. We can practically feel it ticking away, marching on in the same direction with horrifying regularity. Time has enslaved the Western world and become our most precious commodity. Turn it over to the physicists however, and it begins to morph, twist and even crumble away. So what is time exactly?
Article
Hidden dimensions
That geometry should be relevant to physics is no surprise — after all, space is the arena in which physics happens. What is surprising, though, is the extent to which the geometry of space actually determines physics and just how exotic the geometric structure of our Universe appears to be. Plus met up with mathematician Shing-Tung Yau to find out more.
News story
Einstein right on time
Most precise experiment to date confirms one of Einstein's predictions
News story
How does gravity work?
And what are gravitational waves?
News story
What is dark matter?
Find out with Martin Rees
Article
Outer space: Are the constants of nature really constant?
Are the unchanging features of the Universe really unchanging?
News story
The LHC for dummies
The world's biggest physics experiment is due to start
Article
String theory: From Newton to Einstein and beyond
String theory is a theory of everything in which everything's made of strings — but why strings? What do they do? Find out in our equation-free introduction for beginners.