One diver, after a seemingly brief period below the surface, discovers that his gas supply has run perilously low. Another, paralyzed, bobs helplessly on the su

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Caribbean Reef Life covers the full range of a coral reef's biodiversity. This expanded third edition is more than just an ID book; it aims to give divers a dee

Have you ever wondered why levers and pulleys make it easy to lift heavy objects? Or thought about what it is that makes a combustion engine work? The Book of B

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