Archaeologists found a pit of skulls in London. Very beat-up skulls, with signs of having been gnawed by dogs. The skulls also showed signs of previous, physical injuries that had healed. All of which leaves the archaeologists with a couple of theories: The skulls might be from gladiators, unceremoniously discarded when the finally lost, or, they could be from warriors whose heads were taken in battle. I dig this because it's a nice example of how evidence can tell you a lot in archaeology, but it can't always tell you everything. At a certain point, you're left with some alternative historical scenarios that all fit the evidence you've got.