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Beschreibung

Can you roll your tongue into a U-shape? Some people can. But other people's tongues stay flat. What determines whether you can roll your tongue?

Dauer: 4 Minuten (00:03:43)
Veröffentlichungsdatum: 01.01.2017; Unabridged; Copyright Year: 2013. Copyright Statment: —

• Jugendliteratur