There is disagreement among scientists about whether the human brain has shrunk over time, with some research suggesting a decrease in brain volume since the late Pleistocene era, while others argue that there is no evidence of such a decline. The extent and timing of any potential brain shrinkage are also unclear, with varying estimates and timeframes reported. The topic appears to be the subject of ongoing research and debate, with some studies exploring possible connections to human evolution, intelligence, and technology use.