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Scientists use advanced lab techniques to examine every detail of the ruby slippers to understand what they are made of, the age of the materials, and their present state. As a result, they learned how to protect them from deteriorating further.

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Modern bears, while typically thought of as carnivores, actually have a wide variety of dietary preferences. Some eat only meat while others are omnivores, meaning that they eat both meat and vegetation. Cave bears (Ursus spelaeus), an extinct bear species from Europe, are thought to be omnivorous. However, scientists…