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The former head of the Pentagon program responsible for the investigation of UFOs—now known as Unidentified Anomalous Phenomena (UAP)—reveals long-hidden truths with profound implications for not only national security but our understanding of the universe.

The Great Courses has partnered with Smithsonian to bring you a course that will greatly expand your understanding of American history. This course, Native Peoples of North America, pairs the unmatched resources and expertise of the Smithsonian's National Museum of the American Indian with the unparalleled knowledge of Professor Daniel M. Cobb of the University of North Carolina at Chapel Hill to provide a multidisciplinary view of American history.

In a world of self-driving cars and big data, smart algorithms and Siri, we know that artificial intelligence is getting smarter every day. Though all these nifty devices and programs might make our lives easier, they're also well on their way to making "good" jobs obsolete. A computer winning Jeopardy might seem like a trivial, if impressive, feat, but the same technology is making paralegals redundant as it undertakes electronic discovery, and is soon to do the same for radiologists.

This is the first English translation of a portion of Historia Antigua de Mexico, written originally in Spanish by celebrated Mexican historian Mariano Veytia. He relates the history, astronomy, and religious practices he discovered from the charts, diagrams, and paintings of the Native Americans. In addition, he presents an account of America'a first settlers, who left from the biblical Tower of Babel at the time of the confusion of tongues.

In this stirring audiobook, David McCullough tells the intensely human story of those who marched with General George Washington in the year of the Declaration of Independence, when the whole American cause was riding on their success, without which all hope for independence would have been dashed and the noble ideals of the Declaration would have amounted to little more than words on paper.