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$Racing refraction: Who reached the North Pole first?$

Earth

Racing refraction: Who reached the North Pole first?

Peary or Cook? The bending of sunlight has helped to reveal who bent the truth in a century-old debate about which explorer was the first to the North Pole

Features

How to make an origami universe

Space

How to make an origami universe

Features

Try the hardest crossword ever set by a computer

Technology

Try the hardest crossword ever set by a computer

Features

Reverb: Why we dig messy sound

Life

Reverb: Why we dig messy sound

Features

Is the answer to life, the universe and everything 37?

Life

Is the answer to life, the universe and everything 37?

Features

The piste at the end of the universe

Space

The piste at the end of the universe

Features

How to think about… Mathematics

Physics

How to think about… Mathematics

Features

How to think about… Quantum reality

Physics

How to think about… Quantum reality

Features

How to think about… Higher dimensions

Physics

How to think about… Higher dimensions

Features

Forget Turing – I want to test computer creativity

Technology

Forget Turing – I want to test computer creativity

The Turing test is too easy – creativity should be the benchmark of human-like intelligence, says Mark Riedl, inventor of the Lovelace 2.0 test

Opinion

Only 2 per cent of unsold food gets given to poor

News

Space

How to think about… Fields

Features

Technology

Google and NASA ride D-Wave to a quantum future

News

Last Word

Internal reservoirs

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