the open-content textbooks collection that anyone can edit.
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Special Relativity is an introductory text for physics undergraduates and advanced high school students. It is also approachable by the educated layman. It is carefully designed to tackle the physics of simultaneity.
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Wild cats are some of Earth's grandest treasures, and their stories excite the imagination of kids of all ages. Big Cats helps to explore this fascinating family.


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Barbecued Spare Ribs are a classic American barbecue meal, made from pork. This version is cooked in the oven, not on a barbecue, and uses a barbecue sauce with a distinct Asian flavor, featuring soy sauce, rice vinegar, and garlic.
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