With a nod to Arbor Day, here's a rundown of some of the Earth's biggest tree species -- and what ails them.
Found in a rock quarry, the fossils date back to the time of the dinosaurs Continue reading →
Replacing broadleaved forests with evergreen trees is contributing to climate change, even when tree coverage increases. Continue reading →
The plant kingdom has a rich natural history all its own.
Warming temperatures and drought are making it tougher to survive.
Some of the world's largest and most iconic trees are in the path of major wildfires.
Over the last 25 years, we've lost about 1 percent of the Earth's tree cover, but there is good news. Continue reading →
We're outnumbered -- that comes to 422 trees per human being. But their numbers are dwindling.
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