Latest Lesson
Why a Satellite Dish Can Stay Pointed at One Spot
A geostationary satellite matches Earth’s rotation in a circular equatorial orbit. Bob explains why a fixed dish can keep pointing toward i...
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Puzzle through an ethical dilemma and decide: what responsibility do we have to honor the wishes of the dead? -- For decades, Yvonne and Z...
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A long, long time ago, Earth was home to one giant super continent. So, what happened? In this episode of Crash Course Geology, we’ll break...
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Teacher or professor: ZDoggMD Subject: Medical Content of the Lesson: The Dark Lord on administrators, community college, Siri, and more...
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