The brain weighs about 3 pounds and it's about 75% water. Humans have the largest brain to body size ratio. It doesn't grow much from the size it was at birth and stops growing when you're about 18
Your brain keeps developing into your late 40s with new brain connections forming every time you add a memory. The human brain is comprised of about 100 billion neurons and a trillion glial cells
Albert Einstein's brain was proportionately 35% wider in the area responsible for math and spatial perception than the average human brain, even though his overall brain size was 10% smaller than aver
The brain releases dopamine during orgasm in a high enough amount that, when scanned, resembles the brain of a person in a heroine high. Music also releases dopamine. Don't do drugs, you have at least