This week's question is all about energy! Do our bodies manage to harvest all the energy from food or do we miss a few calories here and there? Plus, we ask whose bite is worse, dog or human?

• I suppose the question could be posed relative to any higher animal . My unvarnished question and... - Questions
• Fooling the Brain with Diet Foods - Interviews
• Passengers in a Bacterial Body - Podcasts
• Hi Chris et al., I love the show and have been meaning to write in for a while to ask you a questio... - Questions
• Will my skin soak up the calories in skin cream? - Podcasts
• How many calories does a bacterium, (say somewhere in the gut), use? What proportion of food is ... - Questions