A dramatic blast of cold air may be coming for the United States in late January, courtesy of the polar vortex. Here's what ...

Using the Hubble Space Telescope, astronomers have witnessed an infant star 20 times larger than the sun setting interstellar ...

For decades, scientists believed that a vast stretch of Earth’s early history unfolded under stable and uneventful conditions ...

On January 18, 1911, Eugene Ely made history by landing a Curtiss pusher on the USS Pennsylvania, proving that aircraft could ...