Not only is it not a jellyfish, it's not even an "it," but a "they." The Portuguese man-of-war is a siphonophore, an animal made up of a colony of organisms working together. The man-of-war ...

Men of No. 59 Squadron RAF with their pet rabbits at Vert Galland Aerodrome, 15 May 1918. Animals were essential for both sides in World War One. As well as working hard, they were important for ...