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 amusement park announced Wednesday that the Valravn dive roller coaster will debut in May 2016. It will be over 3,400-feet-long and include a drop of over 200 feet, making the ride the world's tallest, fastest and longest dive coaster in the world, reports the Detroit Free Press. A dive roller coaster is one that includes a free-fall 90-degree drop. Park officials say the coaster will travel at a top speed of 75 mph. Valravn will be the park's 18th coaster. Cedar Fair, based in Sandusky, owns and operates Cedar Point and 10 other amusement parks, three outdoor water parks, an indoor water park, and five hotels.