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.
Ariana Grande. 1  Her height is 5' 2Â½ (1.58 m). 2  She is best friends with Liz Gillies, who is another star from the show. 3  Her name was inspired by Princess Oriana from Felix the Cat.  Ariana has the most Introductions (2 in Season 1, 2 in Season 2 and 3 in Season 3) in the Victorious series.