Most of us think of ourselves as partial descendants of those mass invaders - the Romans, and then the Vikings - throughout Europe and North Africa. However, despite their reputation for ravishing, alongside the pillaging, both groups of imperialists left behind surprisingly little DNA residue in their colonized populations. If you are curious about your heritage, but not to the point of ordering an ancestry DNA test, there is one possible indicator which is surprisingly close to hand - or foot in this case - your foot shape.