To understand the why the cosmic microwave background tells us so much about the Universe, you first need to understand what created it: sound waves travelling through the early Universe.
Cosmology has an ambitious goal: to understand the Universe in its entirety. Find out more here.
Taking apart the CMB picture using the maths of sound.
Some of the Universe's most important secrets are hidden in the shape of a beautiful undulating curve: the power spectrum of the cosmic microwave spectrum. This article explains how.
What is dark energy and how do we know it's there?
Since he Universe is all there is, there's nothing for it to expand into. So what does "expansion" mean?
Cambridge mathematicians and physicists remember their most famous colleague with fondness.