- That the average human brain weighs about 1,400 gm (400 gm at birth), and that the largest ever found was the one of a 50 year old man whose brain weighed 2,049 gm. The largest female brain weighed 1,565 gm and the smallest brain ever was also female and weighed 1,096 gm?

- That, compared with the human brain, the brain of a giraffe weighs 680 gm, the one of a camel 760 gm, a dolphin 1,500 gm, a gorilla 520 gm, a chimpanzee 420 gm, a polar bear 500 gm, a sheep 140 gm, and a turtle 0,3 gm?

-That the human brain is about 2% of the total body weight (150 pound human), and that the brain meassures 140 mm (width) x 167 mm (lenght) x 93 mm (height)?

-That the human brain, with its only 2% of the whole body, utilizes 20% of the oxygen and 20% of the blood?

-That it is estimated that there are 100 billion (100,000,000,000) neurons in the human brain, and that they, if we assume that a neuron is 10 microns wide, would meassure 1,000 km if they were lined up in a straight line?