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Drugs that deliver the health benefits of exercise are tested on mice – "exercise in a pill" – with remarkable results.
Fact File: how the first stars lit up the Universe. The Â鶹ԼÅÄ World on the Move team investigate how north Pacific humpback whales catching herring by "bubble netting". A look at what's ahead for US space agency Nasa as it reaches its 50th anniversary. The pen-tailed treeshrew and its ability to consume large amounts of alcohol with little effect.