Do flies have blood?

03 October 2014
Presented by Chris Smith, Redi Tlhabi

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Greenbottle fly

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Why did dinosaurs grow so large? Do flies have blood? Can chemotherapy get into the brain? Why do scorpions glow in UV light? Did we interbreed with Neanderthals? Plus, news of how your sense of smell can indicate how long you have left to live...

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