Camera trap footage, taken with no humans present to cause a disturbance, shows one chimp after another pick up a rock and hurl it at the same tree. Rocks pile up at the foot of the tree, which starts ...

Chimps that throw stones at trees and let the rocks accumulate at the base do so because they like the sound it makes—not because the trees are sacred and hitting them with stones is part of an ...

Trancing is when dogs enter a slow-motion, focused state while moving under objects, such as Christmas trees. However, the ...

Trees are often viewed as individuals that compete with one another for access to limited resources. But could trees in stressed environments actually benefit from positive, facultative interactions?

Ants have been seen healing wounded trees in Panama—behavior that is believed to have never been observed before. When holes were drilled into Cecropia tree trunks, the ants emerged from their homes ...

Along with energy conservation and storm-water reduction, scientists may soon be adding crime-fighting to the list of benefits that urban trees provide. Researchers have published a new study that ...