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How beautiful is a ring that sparkles, whether perched upon a finger or girdling a gas giant hundreds of millions of miles away. Like precious gems, planetary rings seem all the more beautiful for... read more
https://youtu.be/RwRR_qLgvw8 You probably remember the T.rex’s iconic roar from Jurassic Park, but it turns out that dinosaurs actually didn't sound that ferocious. Hosted by: Hank Green read more