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Picture of the Week

LUX dark matter detector

Detecting dark matter

The kind of matter and energy we can see and touch – whether it is in the form of atoms and molecules, or heat and light, only forms a tiny proportion of the content of the Universe, only about 5%. Over a quarter is dark matter, which is totally invisible but whose gravitational attraction can be detected; while over two thirds is dark energy, a force that pushes the Universe to expand ever faster.
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28 January 2013: Secret of scent lies in molecular vibrations

Molecular vibrations, rather than molecular shape, give substances their distinct smell according to a new study by UCL scientists. More...

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