Sharmila Kuthunur

International cooperation, initiated in the late 1980s, helped heal Earth’s damaged ozone layer and steer it toward recovery.

Here is the origin story of Earth—the only place we know life to exist.

Despite its timeless appearance, the moon has not always been in Earth's orbit, and scientists continue to investigate its true age.

The moon is scattered with buggies, memorabilia and even human waste that astronauts left behind—some intentionally, others out of necessity—during the Apollo era.

Early in its existence, massive asteroids smashed into Earth with lasting consequences for our planet’s geology and life.