From Hitler to Hamas, Western powers have repeatedly dismissed open threats as bluffs — with catastrophic results.

The Orionids meteor shower peaks October 20th/21st here in 2025, coinciding with a new Moon. See the brightest shooting stars of the year!

About six million years ago, the Mediterranean was sealed off from the Atlantic, and over centuries it ran dry. One megaflood reversed that.

Explanations for the cosmic speed limit often conflate mass with inertia.

The latest "Superman" film sets Metropolis in the First State.

Even just by examining the Moon with the unaided eye, we can learn an incredible amount about the Moon, Earth, and more.

In this excerpt from "Agents of Change," Christina Hillsberg tells the story of Martha “Marti” Peterson, the first female case officer stationed in Soviet Moscow.

The tiniest galaxies of all are the most severely dominated by dark matter. Could black holes be the cause of the extra gravity instead?