Latest Lesson
How Humans Changed the Earth: Crash Course Geology #24
Are we in a new geological epoch? Some geologists think so–one marked by human impact on Earth. Others say we’re not there yet. Either way,...
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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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Sharpshooter insects make a living hopping around plants like grapevines and feeding on their sap. When it's time to mate, they shake t...
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Why making glass fibers to send signals was almost impossible. Sponsored by Saily - 🌎 Get an exclusive 15% discount on Saily data plans! ...
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