Astronomical diagram of the seasons and signs of the zodiac, c. 1860

Earth Isn’t the Only Planet With Seasons

But they can look wildly different on other worlds.
Plate Tectonics Diagram

How Plate Tectonics Shook Life into Existence

The cycles of life all rely on the dynamism of the Earth’s crust.
Watercolor painting of the earth by Martin Eklund

On Earth Day

Celebrate Earth Day with stories from JSTOR Daily.
A model showing the layers of Earth

The Woman Who Found the Earth’s Inner Core

Inge Lehmann was the seismologist and mathematician who figured out what the Earth's core was actually made of.
Compass On Antique Map magnetic poles

What Happens if Earth’s Magnetic Poles Reverse?

What would happen if the Earth's magnetic poles flipped? Earth’s magnetic poles have a long history of switching from North to South and back again. 
An Earth-like planet in the foreground and the sun in the background

Kepler Finds Truly Earth-like World

The Kepler telescope discovers a habitable planet.