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NASA
NASA | The Moon's Permanently Shadowed Regions
As you watch the Moon over the course of a month, you'll notice that different features are illuminated by the Sun at different times. However, there are some parts of the Moon that never see sunlight. These areas are called...
Khan Academy
Khan Academy: Early Modern: Emilie Du Chatelet, Part 2
Andrew Janiak (Duke) further introduces Emilie Du Chatelet, a French philosopher, and her contribution to the debate about the principle of sufficient reason. [3:51]
Khan Academy
Khan Academy: Early Modern: Emilie Du Chatelet, Part 1
In this first of two videos, Andrew Janiak introduces Emilie Du Chatelet, a French philosopher, and her contribution to the debate about the principle of sufficient reason. [3:51]