When did people start to swim for recreation?

How does salt water affect copper? How do you act if you see a mermaid? What was the name of the lake where the Aztecs finally saw the symbol? What advantages people get from manmade pond? Is water in a swimming pool a heterogeneous mixture? How many laps do you need to swim in a 22 yard pool to reach 800 yards? What is Michael Phelps moms maiden name? Can corduroy get wet? Is Camelbak Kids a good choice in water bottles for my son? If a diver's surface air consumption rate is 25 psi per minute what would be the consumption rate at 66 feet of seawater? What are two of the bodies of water that border the holy roman empier? What bad thing has poseidon done? How do you get Hercules to push the rock underwater on mythology island? What words describe stream? What would not affect the level at which a canoe floats in a pond? Why don't some people like tourists? What is the best way to roll the PWC to turn it upright after it capsizes? Do both hands have to touch wall to win in swimming breaststroke? What is kroke? Who is Siddhartha Gautama or Buddha the founder of Buddhism?