In the woods near Libby grows a quaking aspen five feet across. It is the biggest in the United States and Milarch has cloned it. He also cloned what is believed to be the nation's largest narrow leaf ...

A fast-track method of breeding disease-resistant ash trees has been developed by researchers leading efforts to conserve the species. Researchers at the John Innes Center, who have adapted the embryo ...

Pests are ravaging keystone species like ash, elm, and beech. But researchers are breeding the survivors into more resilient populations. Port Orford cedar trees in Redwood National Park that were ...