The view from the top of the tower shows leaves emerging across the deciduous forest. On a blustery March morning, Petya Campbell stood atop a 204-foot-tall tower and looked across the waving canopy ...

The view from the top of the tower shows leaves emerging across the deciduous forest. On a blustery March morning, Petya Campbell stood atop a 204-foot-tall tower and looked across the waving canopy ...

The view from the top of the tower shows leaves emerging across the deciduous forest. On a blustery March morning, Petya Campbell stood atop a 204-foot-tall tower and looked across the waving canopy ...

Using instruments old and new, scientists collected data as leaves emerged across a deciduous forest in Edgewater, Maryland.

NASA satellites and sensors constantly take the pulse of our planet, measuring how Earth changes by the day, season, year, and decade. Researchers and resource managers analyze those measurements and ...

On April 29, 1999, NASA Earth Observatory (EO) started delivering science stories and imagery to the public through the Internet. So much has changed in those 20 years… + In 1999, about 3 to 5 percent ...

A rain gauge will collect how much rain falls, but how exactly do scientists measure the size, shape, and fall speed of raindrops near the ground? Patrick Gatlin of NASA’s Marshall Space Flight Center ...

Every month on Earth Matters, we offer a puzzling satellite image. The April 2024 puzzler is shown above. Your challenge is to use the comments section to tell us where it is, what we are looking at, ...

Every month on Earth Matters, we offer a puzzling satellite image. The April 2024 puzzler is shown above. Your challenge is to use the comments section to tell us where it is, what we are looking at, ...

Pine trees (genus Pinus) are evergreen, conifers (they produce cones that encase reproduction seeds) and can be found throughout the world, but they are native to northern temperate regions. There are ...

The time it takes carbon to move through the fast carbon cycle is measured in a lifespan. The fast carbon cycle is largely the movement of carbon through life forms on Earth, or the biosphere. Between ...

Desertification. The word invokes images of sand dunes blowing over abandoned farms as some irresistible, dark force steadily transforms fertile fields into inhospitable wasteland. The United Nations’ ...