The brain size is rather small for such a late date.

Obviously, there has been an overall increase in brain size.

This difference cannot be explained by life history, social behaviour or brain size.

We cannot tell a person's intelligence in any given case by measuring his or her brain size.

"But it could have developed as a function of our brain size, or something else; we don't really know."

Not all investigators are happy with the amount of attention that has been paid to brain size.

Animals with larger brain sizes are expected to learn better.

Does this mean that brain size in some sense causes intelligence?

These fish are also known for having large brain size and unusually high intelligence.

Later studies with better equipment have confirmed this brain size difference.

Social intelligence therefore gives us the answer to that first expansion of brain size two million years ago.

Trying to explain that second expansion in brain size is still a very challenging question.

By the time brain size increase stopped, the hand ax and similar tools were still in use around the world.

It has a number of other biological correlates, including brain size.

This remains the average brain size of modern man.

"Humans sit on the top of the pile when it comes to relative brain size."

Human brain size development is cited as one example.

Several studies have demonstrated correlations between race and brain size, with varying results.

Within human population, studies have been conducted to determine whether there is a relationship between brain size and a number of cognitive measures.

Such competition, the idea goes, might have set off a "cognitive arms race" that led to rapid growth in brain size.

Bambiraptor had a brain size in the lower range of modern birds.

Brain size is one aspect of animal anatomy and evolution.

Their brain size was small and their immune systems weak.

The Guardian also revealed that the rats' brain size had decreased.