Licking Rocks

Have you ever heard that geologists lick rocks? It's true! Your tongue is much more sensitive than your fingers, and can help you determine what kind of rock you have. And your tongue will stick to bone!

Have you ever heard that geologists lick rocks? It’s true! Your tongue is much more sensitive than your fingers, and can help you determine what kind of rock you have. And your tongue will stick to bone!

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