Why do helicopter propellers appear to be stationary?

Saudi Arabia is littered with giant, thick-skinned watermelons—back in the day, you could find them

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A weapon of extreme simplicity yet formidable combat power: the ancient sling!

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It may seem like a waste to use premium wood for mop handles, but it’s actually a clever application

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A神奇, entirely transparent creature in the sea that looks like a silicone toy

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Gay snuggle

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Are the videos we watched fake? Has wild sex education been fooling us all these years?

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Explore and Discover

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Chain reaction

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The world’s Guangji Bridge is the earliest bascule bridge in history.

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Bamboo is drilled and filled with liquor to make bamboo‑tube wine, while tree trunks are scorched to

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Learn something after watching

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The Production of Penicillin

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Why did steam turbines come to dominate global power generation? I was completely convinced after wa

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I hear you’re really good at physics?

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Do you know what kind of water you can use to wash your hands?

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Brother Chao explained: The infinite nesting doll incident in SpongeBob SquarePants, what I saw with

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Brother Chao explained: The cold knowledge in SpongeBob SquarePants, the crab shell of the crab boss

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What Happens if You Swallow an Octopus Whole?

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How much does a house in North Korea cost?

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How big can a belly get when carrying triplets?

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