Researchers in Turkey are about to embark on an excavation at the ancient site of Karahan Tepe and they believe it’s much older than Göbekli Tepe, the famous “zero point of world history.” Until now, like yesterday, if you were to ask any professor of history or even a self-respecting armchair archaeologist to name the oldest monument ever discovered, they would all have said Göbekli Tepe. But now, that answer might be Karahan Tepe, and this is creating a lot of excitement in archaeological circles.