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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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Making penalties fairer

Is the proposed ABBA rule for penalty shootouts really fairer than the existing rule? Maths shows that it is, and also suggests another, more subtle rule.
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Smale's chaotic horseshoe

Want to understand chaos? Then have a look at this famous brainchild of the mathematician Stephen Smale.
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Meyer

Wavelets catch Abel Prize

This year's Abel Prize has been awarded to Yves Meyer for the development of an incredibly powerful mathematical tool.
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Riding the pilot wave

Pilot wave theory is an extension of quantum mechanics that doesn't exhibit any of that weird randomness or fuzziness. But that doesn't mean it's totally sane. Here is a quick introduction.
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Strategic dating: The 37% rule

Are you stumped by the dating game? Never fear — Plus is here! This article looks at one of the central questions of dating: how many people should you date before settling for something serious?

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Hilbert's hotel

How to squeeze infinitely many new guests into a full hotel.
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Watching the cosmos

When it comes to the entire cosmos, we humans are incredibly small and insignificant. But that's precisely why we need to take ourselves into account when thinking about the Universe. Find out why.