Add Yahoo as a preferred source to see more of our stories on Google. A year after a wildfire, the U.S. Forest Service assesses the damage to figure out how many trees need to be planted to restore ...

More than 3 trillion trees now grow on Earth, seven times more than scientists previously thought. But it's also trillions fewer than there used to be, a new study concludes. A United ...

Here is a pop quiz: How many trees are on the planet? Most people have no idea. A new study says the answer is more than 3 trillion trees — that's trillion with a T, and that number is about eight ...

WEST LAFAYETTE, Ind. — 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 ...

Trees occupy much of the Earth’s land surface. Many of us interact with them on a daily basis, whether driving down a rural country road, back-country skiing, or having a picnic in a city park.

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 ...