Monkeys can count, naturally

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The rhesus monkey's ability to count and understand the relationship between numbers seems to be a natural skill, not learnt from man. John Glenn, America's first man in space, will become the oldest astronaut when he lifts off again, aged 77, to conduct medical research into ageing. Also heading into space, the private company SpaceDev that provides transport for scientific missions. Plus, flies with very good hearing.