The team knew that the koa tree originally came from Australia ... monkeys on a raft from Africa to South America less than 50 million years ago, long after the two continents split; and the ...

Yellowed grasses cover the lower southern slopes of Mauna Kea where impenetrable koa forests once stood on the Big Island. But Hawaii's largest endemic tree, with its sickle-shaped leaves ...

As with tropical trees around the world, the koa forests of Hawaii have been decimated — cut down to make way for sugar plantations and cattle ranches. One company is using an innovative ...

In this first story, two ukulele makers strive to save Hawai‘i’s koa tree, found nowhere else in the world. In the process they restore a biodiverse tropical forest on the slopes of the Big ...