The Cairo Fossil Forest is the second oldest in the world. These forests mark a turning point in Earth's history because they changed the composition of the atmosphere, scientists say.

The planet's trees have seen plenty of history pass by their trunks. In fact, they began to populate Earth 385 million years ago, toward the end of the Devonian period. Considered living historical ...

BIG PINE, Calif. (KSWB/KUSI) — Hidden high in the White Mountains of eastern California, a gnarled, weathered tree quietly holds a staggering secret — it’s nearly 5,000 years old. Known as the ...

In a remote area of Coos County, Oregon, a mighty Douglas fir is burning. The tree, known as the Doerner fir, is thought to be between 450 to 500 years old and has lost about 15 meters (50 feet) in ...

PLEASANTON, Calif. (KGO) -- Five protestors showed up Tuesday morning at Lions Wayside Park in Pleasanton to try and block the removal of a eucalyptus tree, thought to be the oldest and largest one in ...

With about 50 ft already lost, the fire may impact the Doerner Fir's standing in global height rankings, officials say.