Why do pigeons bob their heads?
Why do pigeons bob their heads?  
Podcast: Ask the Naked Scientists
Published On: Fri Jan 02 2015
Description: How do chameleons change colour? Why do pigeons bob their heads when they walk? How do railguns work? Can you freeze dry a body? What causes localised hair-loss? What's the best way to cool down beer? Plus, an update on Ebola... Like this podcast? Please help us by supporting the Naked Scientists