An image of magnetic loops on the sun, captured by NASA's Solar Dynamics Observatory on July 18, 2012.

“Space Tornadoes” Could Cause Geomagnetic Storms

But these phenomena, spun off ejections from the Sun, aren’t easy to study.
Charles Darwin

“Mad About Geology”: Charles Darwin’s Origin Story

At university and in the field, Darwin trained his scientific thinking as would a geologist, seeking causal explanations for observed natural phenomena.
The leg of this purple ochre sea star in Oregon is disintegrating, as it dies from sea star wasting syndrome. Photo by Elizabeth Cerny-Chipman, courtesy of Oregon State University.

The Long Quest to Uncover a Sea Star Killing Bacteria

Scientists say they’ve found the cause of a marine epidemic more than ten years after it started. What took so long?
Dancer surrounded by others foragers

The Bee Dance Debate

Can insects communicate? In the middle of the twentieth century, scientists disagreed on whether bees could possess a “language” expressed through motion.
Eruption of Eyjafjallajökull, Iceland

A Massive Eruption 74,000 Years Ago Affected the Whole Planet

Archaeologists use volcanic glass to figure out how people survived.
Ice formations in a cave in Werfen, Austria, 1925

Underground Conquest: Cave Exploration and Nationalism

As cave exploration became more popular and speleology developed as an academic discipline, cave explorers were drawn into a problematic European nationalism.
Two black holes merge into one

Lite Intermediate Black Holes

Meet the supermassive black hole’s smaller, much more mysterious cousin.
Digital visualization of a colourful fractal called a Mandelbrot set.

Fifty Years of Fractals

A half century ago ago, Benoit Mandelbrot coined the word "fractal" and pioneered a new type of geometry.
Two broad wedges made of thousands of tiny dots in colorful bands on a black background.

Shifting Forces: The Evolving Debate Around Dark Energy

New evidence suggests the universe might not behave as expected, raising questions about the costs of being wrong.
Mammal bones protrude from pit 91 at the La Brea Tar Pits on August 17, 2023 in Los Angeles, California.

La Brea and Beyond

Pits and seeps full of tar and asphalt offer new insights into old ecosystems and cultures.