Total solar eclipse, May 29, 1919, at Sobral, Brazil

Bridging The Gap of War: Einstein’s Eclipse

Astronomer Arthur S. Eddington argued that astronomy should be above politics, even when politics leads to world war.
An illustration of seven Earth-size planets orbiting the TRAPPIST-1 star

Why TRAPPIST-1 Is Our Favorite Alien Planetary System

The TRAPPIST-1 system is a treasure trove of possibilities and questions. Observations by JWST have just begun.
This composite image contains X-ray data from Chandra (green and blue) that show heated material in the center of a shell generated by a supernova explosion. Optical data from Hubble show the glowing pink rim, which is ambient gas being shocked by the blast wave from the supernova, as well as the surrounding star field. The Type Ia supernova that resulted in the creation of this remnant would have been visible from Earth some 400 years ago.

How Stars Die

Nothing in this Universe is eternal—not even the stars.
Aerial view of Barringer crater in Arizona

The Eight Best Hidden Impact Craters on Earth

Many impact craters on Earth have been erased thanks to wind, water, and plate tectonics. But scientists have clever ways to find them.
Velcro tape on black background

Versatile Velcro™

Velcro is used in many spaces, from spacecraft to shoes. A relatively recent invention, it was inspired by the close observation of nature.
Pierre-Joseph Buc'hoz. Plantes de Chine

Plant of the Month: Chili Pepper

Few foods elicit such strong reactions as chili peppers. Why do we love something that hurts so much?
A hand holding a corn cob with a spray nozzle on its top

Corn Is Everywhere!

Two educators use the history of corn, from the domestication of maize 10,000 years ago to today's ubiquitous "commodity corn," to teach about biodiversity.
Restoration of an American mastodon herd by Charles R. Knight

This Week in Sustainability: From Ice Age to Internet Age, Scientists Look for Clues to Species’ Extinctions

Scientists explore the causes--climate change, habitat destruction, and more--that decimated animals and humans alike, from Ice Age to Internet Age.
Chili peppers

The Science of Hot Chili Peppers

Why do spicy foods feel hot? A look at the science behind the world's spiciest hot chili peppers, including the new "Dragon's Breath" variety.
Haumea, a dwarf planet

The Weirdest Dwarf Planets Discovered So Far

The solar system is apparently more crowded than we thought: astronomers have discovered a new dwarf planet. Some dwarf planets don't play by the rules.