Evidence of alien life, a clue about the rise of bowel cancer, and a new colour? – podcast

Madeleine Finlay and Ian Sample discuss three intriguing science stories from the week. From a hint at alien life on a distant planet to a clue in the search for answers over why colon cancer rates are rising in the under 50s, and news from scientists who claim to have found a colour no one has seen before

Are we alone? New discovery raises hopes of finding alien life
Childhood toxin exposure may be factor in bowel cancer rise in under-50s'
Hue new? Scientists claim to have found colour no one has seen before

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