A tree species once thought to be extinct is thriving in Michigan. The dawn redwood was rediscovered in the 1940s. Since then, dozens – perhaps even hundreds – have been planted throughout Michigan.

It’s a giant sequoia, a member of Sequoiadendron giganteum ... The President holds nearly two billion leaves. Trees grow tall and wide-crowned as a measure of competition with other trees ...

In the heart of California, the Sequoia and Kings Canyon National Parks are home to some of the tallest trees on the planet.

This giant sequoia, 3,200 years old and growing ever larger in ... But the President has a crown larger than the Sherman's and carries a load of some two billion leaves, more than any other tree. On ...