How long ago did the the species associated with KNM ER 1805 live?
KNM ER 1805: KNM ER 1805 is the catalog number given to several pieces of a fossilized skull of the species "Homo habilis". Homo habilis: Homo habilis was a species of the tribe Hominini, during the Gelasian and early Calabrian stages of the Pleistocene geological epoch, which lived between roughly 2.1 and 1.5 million years ago.
2.1 and 1.5 million years ago