From the 200 Reddit comments...

http://reddit.com/r/pics/comments/2ms7sh/humans_for_scale_on_this_3200_year_old_tree/

...I found a link to 126 images:

http://ngm.nationalgeographic.com/2012/12/sequoias/gatefold-image

Whoa!

"Cloaked in the snows of California’s Sierra Nevada, the 3,200-year-old giant sequoia called the President rises 247 feet. Two other sequoias have wider trunks, but none has a larger crown, say the scientists who climbed it. The figure at top seems taller than the other climbers because he’s standing forward on one of the great limbs."

For perspective, 3200 years is roughly 3 times as long as this tree lasted:

The President giant sequoia tree has 2 billion leaves:

http://www.npr.org/blogs/pictureshow/2012/12/13/167163801/one-photo-126-frames-2-billion-leaves-247-feet