Why are human brains the biggest?

Humans still evolving as our brains shrink

How does the human brain process and store information, and what are the underlying mechanisms of memory formation and retrieval?

Why do humans have such huge brains? Scientists have a few hypotheses. - Vox

Human evolution - Brain Size, Adaptations, Fossils

Brains The Smithsonian Institution's Human Origins Program

2015-2016 BIOLOGY - Mr. Jeremy T. Rosen

Who has or had the largest human brain? - Quora

The Anatomy of the Human Brain

How awesome is the human brain? - Quora

2015-2016 BIOLOGY - Mr. Jeremy T. Rosen