In the meantime, some monkey tools could throw a monkey wrench into archaeological research. The timeline of ancient tools shows the timeline of ancient human innovation, but some monkey-made stone flakes resemble those of our primitive predecessors.
The monkeys, Brazilian capuchins, create them through a "mysterious stone hammering ritual." They frequent quartz cliffs, selecting round stones and smashing them into outcroppings until the smashers are covered in "razor-sharp rock dust," which they lick up. And as they smash away, they unintentionally create stone flakes.
The flakes share similarities with those made by pre-human species (like Australopithecus or Kenyanthropus) around 3.3 million years ago. That's about 3 million years before Homo sapiens emerged via extraterrestrial engineering experiments, according to late-night History programming. But the capuchins are uninterested in and ignore the stone flakes, unlike our hominid ancestors who at one point realized they could cut things real nice. Instead, the monkeys may be after the mineral-rich quartz dust, which could help guard against gastrointestinal parasites.
Another difference between the little monkeys and the big monkeys (i.e., us) is that we humans are "obligate tool-users." We can't separate our tool use from our evolution, livelihoods, or even our human essentiality. We are our tools. Whereas monkeys and apes can be considered "technological primates" because they only use tools occasionally and could just as happily enjoy their orgies and flea-picking sessions (which often coincide) without ever lifting a stone.
The capuchins' (and potentially other primates') monkeying around may lead to clumsy, uncoordinated fistfights between various –ologists. But it's unlikely to overturn major discoveries, as many are corroborated by cut-marked bones, signs of Homo habitation, and other contextual evidence of our fore-elders.