People needed another way to gather food, probably. Going out in a boat or something was probably too dangerous, so they needed to have the abilities to save themselves if they fell into water.
People wanted less probability of drowning, so it probably was a safety thing.
Yes there was, they had invented swimming pools by then.
the beach ball
Swimming pools go back as far as 2,500 BC exact dates are a little hard to determine as the council records from those days are a little vague to say the least.
Swimming pool sports started from Britain around 1830, but first swimming pools games started in Olympic in 1896.
No one invented swimmers, people used bath houses in medieval time which came into swimming pools, a good way to excersize and keep oneself clean. This came to be pools, and eventually turned into a sport in around the 1800's mainly in Europe using the breastroke, but for more variety, laws were made for it and different strokes were created, into the swimming sport we have today!
Ring Clark rubber and ask
If we could find a name, you wouldn't recognize it anyway. The best answer is that pools were probably developed as soon as somebody learned how to collect water in an artificial basin. The answer has been lost in time.Swimming pool go back at least to Roman times Pre 2,000 years many of them were even heated.
In ground swimming pools are usually bigger than above ground pools. Although rather more expensive, in ground pools will last longer than above ground pools.
Ball Pools
Springs or pools in the desert are oases.
Pools of Light was created in 2005.
Jefferson Pools was created in 1761.