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.
Walt Disney World, Universal Orlando and the SeaWorld are always reinventing themselves in a bid to entice visitors each year - 2016 will be distinguished by a pair of new roller coasters. SeaWorld will have the most eye-catching attraction, as it unveils Mako on June 10, the tallest, longest and fastest ride in Orlando. Themed around the mako shark, which is the fastest and most agile shark in the world, the coaster will reach 200ft in height, and 73mph as it zooms along 4,760ft of steel track.