Trees are so common that it’s easy to assume no one has ever counted them. Surprisingly, scientists have. While no one has physically counted every trunk and branch, researchers have combined ...

A new study involving more than 100 scientists from across the globe and the largest forest database yet assembled estimates that there are about 73,000 tree species on Earth, including about 9,200 ...

Trees are the “lungs” of the Earth — leafy organisms that produce the oxygen we breathe in every day and cycle the carbon dioxide we breathe out. But despite trees’ vital importance to human survival, ...

Flying over Oregon's woodlands, tree health specialist Danny DePinte was stunned by what he saw: a stretch of dead fir that seemed to go on and on. "As we continued to fly along, it just kept going.

One person can’t measure all the trees in the world, but when many people come together, a global view becomes possible. A worldwide collaboration of scientists has produced the first ground-sourced ...

a Spatial pattern of tree numbers within a 0.01° grid. b Latitudinal distribution of tree density and total tree numbers, with shaded areas indicating the standard deviation of the estimated tree ...

Living in a densely populated urban environment can pose a number of challenges. For many people living in cities and towns, air pollution is a serious problem that can impact health. Hubs of culture, ...