1 The brain makes up about 2 percent of a human's body weight. 2  The cerebrum makes up 85 percent of the brain's weight. 3  It contains about 86 billion nerve cells (neurons), the gray matter.
Rooney Mara's Height is 5ft 3in (160 cm). American Actress best known for her portrayal of Lisbeth Salander in the US remake of The Girl with the Dragon Tattoo.
Biography: Rooney Mara was born in Bedford, New York on April 17, 1985. She studied international social policy and psychology in New York University. She began focusing on acting when she appeared in student films in NYU.