An artificial big toe found on the foot of an ancient Egyptian mummy could be the world's earliest functional fake body part, UK experts believe. A Manchester University team hope to prove that the leather and wood "Cairo toe" not only looked the part but also helped its owner walk. They will test a replica in volunteers whose right big toe is missing. If true, the toe will predate the currently considered earliest practical prosthesis - a fake leg from 300BC. If we can prove it was functional then we will have pushed back prosthetic medicine by as much as...