At up to 368 feet (112 meters) and 1,500 years old, redwoods are among the world's tallest and oldest living trees. Researchers are struggling to understand and protect these natural treasures.

California’s giant redwood ... of these trees. Thankfully, conservation efforts began in earnest when the Save the Redwoods League formed in 1918. This group purchased large tracts of redwood ...

but the cones are the size of a large olive. The bark can be up to 12 inches thick and contains many tannins. Accordingly, the trees are resistant to insects and diseases. Coastal redwoods do not ...