Gilder Lehrman Institute of American History
Gilder Lehrman Institute: How Was North America Settled Before European Colonization?
Professor Peter C. Mancall from the University of Southern California provides an explanation for how North America was settled before European Colonization. [1:47]
Gilder Lehrman Institute of American History
Gilder Lehrman Institute: History Now: Earth Day 1970: Teach in Made the Green Generation
[Free Registration/Login Required] Hear Adam Rome discuss his book, Earth Day 1970: The Teach-In That Made the Green Generation, which addresses the reform movement of protecting the environment. The first formal Earth Day took place in...