How Mars Lost Its Magnetic Field—and Then Its Oceans
Chemical changes inside Mars's core caused it to lose its magnetic field. This, in turn, caused it to lose its oceans. But how?
“Tell Me about a Complicated Man”: A Homer Reading List
The amount of scholarship on Homer and his works can be daunting. We've created this introductory reading list to help guide your explorations.
The Carrington Event of 1859 Disrupted Telegraph Lines. A “Miyake Event” Would Be Far Worse
We don't know what causes Miyake events, but these great surges of energy can help us understand the past—while posing a threat to our future.
Darling or Degrading? Baby Shows in the Nineteenth Century
A stunningly popular form of entertainment, baby pageants promoted the cult of domesticity, showcased maternal pride, and opened a path to fame and wealth.
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.
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.
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.
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.
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.
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.