insider.si.edu

North American freshwater mussels natural history, ecology, and conservation Wendell R. Haag

1. Introduction to mussels and mussel ecology -- 2. Catching the mussel bug : a history of the study of mussel ecology in North America -- 3. Diversity and biogeography -- 4. Aquatic habitats and ...
Smithsonian Magazine

An Ancient Sea Once Split North America Down the Middle. The Beautiful Multicolored Ammonite Shells From Its Waters Are So Perfectly Preserved That They Still Shimmer Today

Ammonites swam in the Western Interior Seaway that once covered a large portion of North America. These iridescent fossils from South Dakota, around 69–72 million years old, preserve inner shell ...
The Nation

The Impossibly Intertwined History of the Americas

A conversation with Greg Grandin about his groundbreaking new book America, América: A New History of the New World. The “Visscher Map of the New World” including North and South America, 1658. A ...