Naked Scientist

Is it possible to tell how happy a dog is by watching the way it wags its tail? Why is the Eiffel Tower 15 centimetres taller in mid-summer than it is in mid-winter? Does sound travel faster in water or air? Can one really read other people like a book? Why do so many people hate eating their greens?

Firmly in the tradition of DOES ANYTHING EAT WASPS? new scientific kid on the block Chris Smith - ...