04:20 Life Sciences The ferocious predatory dinosaurs of Cretaceous Sahara Lesson duration 04:20 1,967,570 Views
05:31 Engineering Why don't perpetual motion machines ever work? Lesson duration 05:31 16,883,901 Views
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04:33 History Who were the Vestal Virgins, and what was their job? Lesson duration 04:33 9,947,764 Views
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05:10 Literature Why should you read Tolstoy's "War and Peace"? Lesson duration 05:10 5,424,792 Views
05:06 History How did Dracula become the world's most famous vampire? Lesson duration 05:06 3,952,915 Views
06:26 Science & Technology How oceanographers found the Titanic Lesson duration 06:26 3,045,404 Views
