The largest organism is the Armillaria ostoyae, also known as the "humongous fungus." The fungus covers 2,385 acres and is 8,650 years old, weighing 35,000 tons. Experts suggest that other organisms ...

Hidden beneath a quiet patch of forest in eastern Oregon, a single organism has quietly conquered the landscape, killing trees as it spreads and knitting the soil together with living threads.

The world’s largest organism isn’t a blue whale. It is a colony of aspen trees in Utah’s Fishlake National Park. Scientists discovered through DNA testing that the 47,000 trees that make up this stand ...