# The brain is made of billions of cells, and we need tools that can reach them all by Edward S. Boyden > "The brain is made of billions of cells, and we need tools that can reach them all." > **— Edward S. Boyden**, *Neurotechnology talks, compressed candidate wording* Verification Status: Unverified — exact wording/source has not yet been independently confirmed against a primary source; source clue: Neurotechnology talks, compressed candidate wording.