Dr Chris Smith and the Naked Scientist team present the latest science news, analysis and breakthroughs,

In this week's episode... why cancer waiting lists have lengthened and the importance of catching the disease early? Also how pollution is blinding insects to plants they might want to pollinate? And how do blueberries come by their colour? It’s not as simple as it sounds, squash one and you’ll see they are not blue inside. Plus we’re looking at the debate at around assisted dying after Dame Esther Rantzen told the BBC she’s decided to join an assisted dying clinic in Switzerland.

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