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.
In 1998, Intamin built its first inverted roller coaster, which to this day is still the fastest complete circuit inverted roller coaster in the world. Volcano: The Blast Coaster, at Kings Dominion in Virginia, literally blew the Vekoma SLC design away. It features a linear induction motor launch from 0 to 70 out of the top of a 155-foot volcano.