At the age of six (6) years.
it's roughly twice the size of the human brain.
The average Neanderthal brain size was about 1,600 cc, which is slightly larger than the average modern human brain size of around 1,400 cc. This suggests that Neanderthals had relatively large brains compared to their body size.
The average size of a donkey's brain is comparable to a human. The donkey's brain is between 50 and 75 percent of the size of the human brain.
the size of a human fist
It is one-third the size of a human brain.
no
about 25
False. The prefrontal cortex is not fully developed till at least 19.
A mini lop rabbit will probably reach its full size between 6 to 8 months
In some respects brain development continues until about the age of 25 in most people. But brain growth in the sense of it getting bigger ends a lot earlier than that- usually at around the age of twelve years.
Neanderthals had slightly larger brains than modern humans on average, but there were differences in the organization and structure of their brains. Neanderthals had a larger visual processing area, while modern humans have larger areas related to higher cognitive functions. Neanderthals likely had similar cognitive abilities to modern humans, but may have had differences in social behaviors and communication.
The average human brain weighs three pounds (1.36 kilograms). The average female brain capacity is 79.3 cubic inches, slightly smaller than the male brain of 88.5 cubic inches. The largest human brains may be twice those of average size, but size has no relevance to brain performance.