04:33 History Why wasn’t the Bill of Rights originally in the US Constitution? Lesson duration 04:33 1,114,489 Views
10:52 Philosophy Ralph Waldo Emerson and the Beauty of the Everyday Lesson duration 10:52 1,201,581 Views
05:03 Physical Science The otherworldly creatures in the ocean's deepest depths Lesson duration 05:03 2,318,359 Views
06:17 Earth and Space Science Three Ways to Destroy the Universe Lesson duration 06:17 28,339,795 Views
