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239,757 public questions across 1,818 topics. Challenge yourself, or build the perfect quiz for game night.

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Hard Earthquakes

What was the focal depth in kilometers of the 2011 Tōhoku earthquake?

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Intermediate Photosynthesis

How many protein subunits does the plant enzyme Rubisco consist of?

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Easy Photosynthesis

Which scientist discovered that plants release oxygen in 1772?

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Hard Birds

Which crane species was saved from extinction by captive breeding starting from only 21 birds?

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Hard Birds

Which extinct New Zealand bird had white-tipped tail feathers used in Maori headdresses?

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