This week on Ask the Naked Scientists we find out why a beating turns us blue, what would happen in a fight between bullets and how hanging from the air is considered safe in the form of a suspension bridge. We also find out about an environmentally-friendly method of cremation, whether it's possible for humans to survive on mars and what the term horse-power actually means. All that and even more of your questions answered on this weeks podcast Like this podcast? Please help us by supporting the Naked Scientists Like this podcast? Please help us by supporting the Naked Scientists