Richard Preston is best known for his book The Hot Zone, a thriller about the Ebola virus. But while he's not writing, Preston has a hobby: he climbs some of the largest trees in the world -- redwoods ranging up to 38 stories tall, thirty feet in diameter, and over 2,000 years old. Now that's a tree.
Preston gave a TED Talk last year explaining the history of these trees, and what it's like to climb them. It's a fascinating look at another kind of life, that exists in a completely different timescale. Have a look:
See also: more on Sequoia sempervirens, the California Redwood.