Tracking the lives of some of the oldest and tallest trees in the world.

Video duration 5:03

What's killing Yosemite's trees? Ten years into a unique scientific project monitoring the famous forest, what have researchers learned?

Video duration 0:58

'Firefall' in Yosemite stuns visitors The rare phenomenon happens when light hits a waterfall tumbling down El Capitan.

Video duration 4:56

'Losing everything has made me stronger' Five months ago, a wildfire destroyed the town of Paradise. This is how survivors are trying to start over.

Video duration 1:23

Obama talks climate change in Yosemite President Barack Obama draws attention to the dangers of climate change while on a visit to Yosemite National Park in California.

Video duration 1:01

Yosemite fire: Giant trees at risk A huge fire in and around California's Yosemite National Park is threatening California's renowned giant sequoia trees.

Video duration 1:30

Wildfires spread into Yosemite Around 4,000 fire fighters are still struggling to contain a huge wildfire that has been burning for the past 11 days near California's Yosemite National Park.

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