Tree Rings of a Stump

How Tree Ring Records Can Help Predict Droughts

Inside the trunks of trees lies a wealth of data on climate that goes back generations.
An image from the cover of the September 4, 1980 issue of Philadelphia Gay News

Discovering the “Gay Lifestyle” through 1970s Magazines

The gay men's magazines QQ and Ciao! were unabashedly liberated, but they still catered to an exclusive audience.
Illustration of a pink unicorn and an amazed young man

The Unicorns of JSTOR

These rare creatures have by turn—and somewhat paradoxically—been associated with purity, fertility, seduction, healing, sacrifice, immortality, and divinity.
Boxes of tamale pie, tostadas and taco casserole with figurine

Who Invented the “Mexican” Food of the United States?

The debate over what counts as authentic Mexican food may be moot when there are 7,000 Taco Bells around the world.
A British soldier training in 1941

The Bayonet: What’s the Point?

According to one scholar, the military sees training in this obsolete weapon as helpful on the modern battlefield.
Galen by Ferdinand Georg Waldmüller

Library Fires Have Always Been Tragedies. Just Ask Galen.

When Rome burned in 192 CE, the city's vibrant community of scholars was devastated. The physician Galen described the scale of the loss.
A postcard for the Derby Arboretum

Uplifting the Masses with Public Parks

Created in Victorian England, the earliest public parks were on a civilizing mission.
A Jewish Welfare Board cookout for soldiers

Community Cookbooks and the Women Who Wrote Them

Before "local" became a foodie obsession, small groups of women published collections of their own recipes. And still do!
A poster promoting healthy eating from between 1941 and 1945

The Idea of “Good Nutrition” Has Changed Over Time

But one thing has been constant: the tendency to call some foods better for you than others.
Dust rising from combine during crop harvesting

The Greenhouse Gas That’s More Potent Than Carbon Dioxide

Emitting just 1 ton of nitrous oxide—a common ingredient in synthetic fertilizer—is roughly equivalent to emitting 300 tons of carbon dioxide.