focus for this week: Why don't birds fly backwards ?
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Subcategories

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C

• [×] CC-by-sa 2.5 (0)
• [×] CC-by-sa 3.0 (0)

Pages in category "CC-by-sa"

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C

• I ask questions:Copyright

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• Blog:Observations/licence change for wiki text

Media in category "CC-by-sa"

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