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.
Nagashima Spa Land, Nagashima, Japan. Type of coaster: Out and back terra-coaster. Height: 318 feet. Unlike the launched rides that follow it on the world's tallest roller coasters list, Steel Dragon 2000 uses a traditional lift hill (rising an incredible 318 feet) and gravity to propel it to a face-melting speed. At four minutes and with a length of 8133' feet, the coaster is the world's longest.