gravity
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?
This podcast featuring Paul Davies, a theoretical physicist and cosmologist at Arizona State University and Director of BEYOND: Centre for Fundamental Concepts in Science, explores this difficult question and accompanies our What is time article.
Physicists believe that around 82% of all the matter in the Universe is invisible dark matter. But if it's invisible how do they know it's there?
A quick introduction to one of the greatest discoveries of the century.
A quick introduction to the monsters that lurk at the centre of each galaxy.
David Tong explains one of the most important equations in science.
The newly observed ripple in spacetime will help us unlock some of the secrets of the Universe.
Astronomers have explained a strange effect observed in the vicinity of black holes.
A closer look at the power of symmetry in physics.