Watercolor illustration of Plumeria Acuminata commissioned by Scottish doctor and botanist William Roxburgh, late 18th century or early 19th century.

Plant of the Month: Frangipani

An ornamental plant whose white flowers hang over graveyards and temples in Southeast Asia presents complicated questions on national belonging and religious identity.
American Army Entering the City of Mexico, Filippo Constaggini, 1885

The Treaty of Guadalupe Hidalgo: Annotated

Signed February 2, 1848, the treaty compelled Mexico to cede 55 percent of its territory, bringing more than 525,000 square miles under US sovereignty.
Source: http://beeld.teylersmuseum.nl/Digital_Library/Emags/149b_439-2/pubData/source/images/zoompages/zoompage86.jpg

Plant of the Month: Sunflower

With the invasion of Ukraine, it seemed like sunflowers suddenly appeared on the political landscape. Yet they’ve long held symbolic and economic value in Europe.
Close up of illustration of prisoners from La Roca

St. Patrick’s Day in Prison

Offhand references to St. Patrick’s Day showcase broader humor, humanity, and history in the American Prison Newspapers collection.
A print based on David Gilmour Blythe's fanciful painting of Lincoln writing the Emancipation Proclamation

The Emancipation Proclamation: Annotated

Abraham Lincoln proclaimed freedom for enslaved people in America on January 1, 1863. Today, we've annotated the Emancipation Proclamation for readers.
Governor William Burnet of New York meets with the Iroquois in 1721

The Native American Roots of the US Constitution

The Iroquois, Shawnee, Cherokee, and other political formations generally separated military and civil leadership and guarded certain personal freedoms.
Psilocybe Cubensis

The Nice Married Couple Who Inspired People to ’Shroom

In the 1950s, Gordon and Valentina Wasson encountered magic mushrooms. Then they wouldn't stop talking about them.
Dr. Chien-Shiung Wu

Chien-Shiung Wu, the First Lady of Physics 

Chien-Shiung Wu disproved a fundamental law of physics—a stunning achievement that helped earn her male colleagues (but not her) a Nobel Prize.
Charles David Keeling & George W. Bush, 2001

How Charles Keeling Measured the Rise of Carbon Dioxide

The climate scientist created a new method to measure atmospheric carbon dioxide. It's still used today.
An illustration of sunspots from between 1885 and 1890

Do Sunspots Explain Global Recession, War, or Famine?

Maybe it's something about the number eleven?