This photo by Loewenstein shows a cogongrass rhizome that has bored through the root of a pine tree. New shoots coming up from the rhizomes are also sharp enough to cut through lightweight denim ...

The culprit’s name is Pinus canariensis, more commonly known as the Canary Island pine. It’s endemic to the outer Canary Islands, but this particular pine has put down 30-year-old roots in ...

High on a ridge in California’s Eastern Sierra, a gnarled bristlecone pine ... the tree might hold a new record: 5,484 years old. (That record excludes clonal trees that share root systems ...