It's no secret NASA has giant lasers, but instead of zapping the world with them Dr. Evil style, scientists are using a few of them to map the height of the earth's forests, Mashable reports.
NASA scientists used data collected by the ICEsat (ice, cloud and elevation satellite), and Terra and Aqua satellites (earth observation satellites) to make a topographical map of forests around the world. The map will be published in scientific journal, Geophysical Research Letters, in August.
So where are the world's tallest forests? The satellite images found they're in North America's Pacific Northwest and in Southeast Asia. Click here to read more about the project.