At the summit of Llullaillaco, a volcano in the Andes that rises 6739 metres above sea level, lives a mouse. It is the highest dwelling mammal in the world – and how it survives in an environment so hostile that it has been compared to Mars has left scientists baffled. Image: Dick Culbert
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An archaeological excavation in southern Spain has uncovered the 2000-year-old remains of a lapdog that may have been born thousands of kilometres to the east, a discovery that hints at a long-distance trade in lapdogs across the Roman world. Image: Martin Sánchez et al
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The ancient human species Australopithecus afarensis may have been the earliest hominin to run on two legs. Although it had relatively short, ape-like legs, A. afarensis may have had a long Achilles’ tendon just like modern humans do – a feature that helps us to run more efficiently. Image: Noeluap
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Monty Python’s Minister of Silly Walks has been making audiences laugh for 50 years, and now we have a sense of just how silly his walking style is. An analysis shows that John Cleese’s iconic walk is about 6.7 times more variable – sillier – than standard human walking. Image: iT@c
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As well as being brightly coloured in normal light, some dinosaurs may have had ultraviolet, fluorescing horns, frills or feathers – and a few species might even have used this glow to attract a mate. Image: Brian Engh/dontmesswithdinosaurs.com
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