A touch-sensitive gadget with the sensing panel on its back, instead of the screen, is being developed by US researchers. Using your fingers behind the device allows a firmer grip and more accurate performance without obscuring your view of the screen, they say. Image: Ricky Romero
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Take a bunch of lap dancers, some lustful men and a fistful of dollars, and you have the best evidence yet for the controversial idea that women send out signals which reveal their fertile periods. Image: Robbie Biller
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Scientists have discovered a dark side to stem cells. The restorative properties that could make adult stem cells so useful in tissue repair may also help cancers to spread and grow. Image: TheJCB
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UK researchers have developed an image search engine that looks at the content of images to produce results. Instead of guessing based on words that appear on the same web page as current search engines do, it learns to recognise things in images from sets tagged by humans. Image: Auntie P
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Could the immune system be reprogrammed to fight cancer? It seems that macrophages – immune cells roped in by tumours to help them grow – can be turned into cancer killers. Image: Carl Zeiss Microscopy
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