Giant Sequoias- worlds largest tree

A tree-climbing scientist and his team have learned surprising new facts about giant sequoias by measuring them inch by inch.

The giant sequoia is a snow tree, Sillett says, adapted for long winters in the Sierra. But it’s a fire tree too. Thick bark protects it from burning in lightning-caused fires, which open cones and clear the understory, allowing saplings to find light and prosper.   Image credit: Michael Nichols/National Geographic



Giant Sequoias Image credit: Michael Nichols/National Geographic

Giant sequoias live at high elevations, enduring cold, heavy snows, lightning strikes—and growing bulky and strong, though not so tall as coast redwoods. This individual, the President, is the second most massive tree known on Earth.

 

Giant Sequoias Image credit: Michael Nichols/National Geographic

The living crown (this one atop the General Sherman, at center) was once a distant mystery. Scientist Steve Sillett’s new arboreal studies have yielded revelations, including this: These old trees are still growing fast.



 

Giant Sequoiascredit: National Geographic

The images are from the December issue of National Geographic magazine.

source National Geographic