Atmosphere

Earth Atmosphere

From an average altitude of 400 kilometers above the surface of Earth, the brilliant shades of orange and red along our planet’s curving limb are often stunning. They also showcase an […]

Mega Chad

Lake Mega Chad

About 7,000 years ago, a vast lake spread hundreds of square kilometers across north-central Africa. Known to scientists as Lake Mega Chad, it covered more than 400,000 square kilometers at […]

Meteor shower from space

Meteor shower from space

Every January, bits of asteroid 2003 EH1 cross paths with Earth’s orbit to create a beautiful annual meteor shower: the Quadrantids. As the fragments collide with our atmosphere, they disintegrate […]

Porpoise Bay, Antarctica

Porpoise Bay, Antarctica

The incredibly smooth surface of the sea ice indicates that it is topped with ample snow—possibly as much as tens of meters—which also drifted onto the berg’s left side. “That […]