The Jardin de Reuilly, a park east of Paris, has the first fountain of its kind in France - called La Petillante - thanks to the publicly owned water company Eau de Paris.

The researchers asked young men to dance in a laboratory to a very basic drum rhythm. Their dances were played back to a group of women who rated them on a scale of one to seven.

Frogs protect themselves by secreting chemicals that kill germs on their skin. So the theory is that some of these chemicals could be used as antibiotics.