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.
She has a family background in the world of football: One great-great-grandfather, Wellington Mara, founded the New York Giants, and another, Art Rooney, founded the Pittsburgh Steelers. Who else was up for the role? Almost every twenty-something actress in Hollywood.