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.
Sibling Face Off: Rooney Versus Kate Mara. Today is Girl With The Dragon Tattoo star Rooney Maraâs birthday, so we figured now was as good a time as any to pit her against older sister Kate in a head-to-head battle to determine, once and for all, WHO IS THE BEST MARA?!?!?