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What happened before the Big Bang?
Did the Big Bang mark the beginning of time? Not if we live in a bubble multiverse!
Content about “ Big Bang
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Cambridge appoints first-ever Hawking Professor of Cosmology
Daniel Baumann will be treading in Hawking's legendary footsteps, pursuing a central question of the field: How did the Universe begin? Find out more in this article.
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Stephen Hawking: Milestones of a life in physics
A quick tour to some of Hawking's most significant achievements.
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Cosmic peaks
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.
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Who's watching: The cosmic microwave background
Find out all you need to know about the cosmic microwave background in this comprehensive overview.
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The cosmic soup
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.
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The cosmic afterglow
The cosmic microwave background is the earliest light we can see in the Universe. So important is this baby picture of the Universe, it's been involved in two Nobel Prizes. Why?
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New windows on the Universe
Find out what gravitational waves will tell us about the Universe: from understanding its birth to figuring out whether black holes have hairs.
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Listening for ripples in spacetime
Find out about the heroic effort that led to the detection of gravitational waves and the excitement of their discovery.
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What is a universe?
What do we know about our Universe? And could there be more than one?
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In the beginning…
Bob Wald tells us why probabilities are important in cosmology.
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The puzzle of time
Why does time only ever move in one direction? We talk to philosophers of physics Jeremy Butterfield and David Wallace, as well as the eminent Roger Penrose about the puzzle time poses to physicists and what it has to do with the Big Bang and the second law of thermodynamics.