Article: Questions and answers for kids. (Originated from Knight-Ridder Newspapers)

Q. Are diplomas really made out of sheepskin? _Toni Maestrabe. 
A. At one time, most diplomas were made of sheepskin. But it's very expensive. It is made from a thin layer of the hide of a sheep, and has to be stored in a humid place, or it will curl up. The coloring of the sheepskin is uneven, and vein lines often show in it. Also, it is hard to use some printing techniques, such as engraving, on sheepskin. Most high-grade diplomas today are made of 100 percent cotton rag. But Notre Dame is among the few schools that still award real sheepskin diplomas. 
Q. How long ago did the continents separate? _Debbie Wiff. 
A. The supercontinent of Pangea is thought to have ...

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