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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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Archive of Mathematical and Physical Sciences Picture of the Week

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14 April 2014: 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.
More...

7 April 2014: Kills germs fast

Researchers in UCL's Chemistry department have developed an antibacterial surface that could help cut down on hospital–acquired infections. Scientists have known for some time that certain dyes, when illuminated with strong light, have an antibacterial effect. This is a promising technology as, unlike antibacterial fluids that sit on a surface and can be easily wiped away, the germ–killing properties are part of the surface itself. More...

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