Editor's choice
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Astronomy Photographer of the Year 2013 shortlist - in pictures
Gallery (15 pictures) The Royal Observatory Greenwich has announced the shortlist for the 2013 Astronomy Photographer of the Year competition. Here are all 15 stunning pictures
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The mystery of monogamy: scientists claim to have the answer
Study says some species have become monogamous through evolution and, for primates, infanticide is at its root
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Podcast: The everyday mathematics of danger
Audio (37min 37sec) David Spiegelhalter and Michael Blastland discuss their book The Norm Chronicles: Stories and Numbers About Danger