Giant Sequoia Trees
Ancient giant sequoia trees are nature's ever-growing wonders. Giant sequoias grow naturally on the western slopes of California's Sierra Nevada Mountains at elevations from 5,000 to 7,000 feet. Some are as tall as a 26-story building, with their trunks spanning up to 100 feet and the bark on the older specimens reaching two to four feet thick.
California's Sequoia National Park is home to several noteworthy giants, including the General Sherman, which is the world's largest tree by volume, measuring 274.9 feet high, almost 103 feet around, and comprising 52,508 cubic feet of wood. Giant sequoia trees are estimated to be between 1,800 and 2,700 years old. Depending on the tree and where it is situated, giant sequoias can grow up to two feet in height every year, producing almost 40 cubic feet of additional wood each year.
Helen Davies, Marjorie Dorfman, Mary Fons, Deborah Hawkins, Martin Hintz, Linnea Lundgren, David Priess, Julia Clark Robinson, Paul Seaburn, Heidi Stevens, and Steve Theunissen
The Tropic of Cancer is the line of latitude that's the northern boundary of the area referred to as the tropics. HowStuffWorks checks it out.