1 The cerebrum makes up 85 percent of the brain's weight. 2  It contains about 86 billion nerve cells (neurons), the gray matter. 3  It contains billions of nerve fibers (axons and dendrites), the white matter. 4  These neurons are connected by trillions of connections, or synapses.
Making a Mammoth splash: The longest water-coaster in the world. These are the first images of the world's longest water-coaster - a ride that is guaranteed to make a splash when its (flood) gates open next year. The Mammoth, which cost $9 million (Â£5.5 million) and features a five-storey drop, will open at Holiday World & Splashin' Safari, in Santa Claus, Indiana, in May 2012.
The wooden coaster officially opened its terrifying tracks to the public Thursday morning, breaking three world records in the process. Goliath is now the tallest, fastest and steepest wooden roller coaster in the world. See also: Inside the World's Most Dangerous Amusement Park. Daring riders will reach speeds of 72 mph, after plunging from a height of 180 feet down a nearly vertical 85 degree drop.