Can custard cause catastrophic explosions? How will the human race evolve? Can we use water as a fuel? We tackle all these on this week's Ask the Naked Scientists, as well as discovering why the hair on our bodies grows differently to the hair on our heads, asking if the earth will ever run out of oxygen and finding out if a 'fat strip' could solve our weight problems... Like this podcast? Please help us by supporting the Naked Scientists Like this podcast? Please help us by supporting the Naked Scientists