In a previous blog article concerning the Discovery Networks Mermaids: The Body Found I discussed how highly improbable it would be for mermaids to remain hidden for so long, and in another previous blog article I discussed how it was highly improbable that such a creature could even evolve from humans (especially concerning the short frame of time the show gave for mermaids to have evolved from one of our ancient ancestors).
Now despite this, many of you are probably wondering why there are so many stories about mermaids around the world, yet such creatures can not exist?
The most likely reason behind why the mermaid myth even got created in the first place isn't because someone actually saw a real mermaid, it's because some one saw something they couldn't explain, and they told other people what they saw, and the myth spread, which is how I mentioned in another previous blog article about how myths get started in the first place
Most likely what happened was that someone from inland who isn't near any deep bodies of water traveled to either a lake, or a large river, or to the sea, and saw someone swimming. Now for us we would see someone swimming in the water and we would probably think "oh that person is swimming", but for a person that does not swim, and doesn't even know that people can swim, that person just might think "that person must have a fish tail" or "that person must be part fish". This person goes and tells their people what they saw, and thus the myth gets spread. This scenario probably happened all over the world as well, which is why the myth is so wide spread.
This is somewhat similar to how the myth about the centaur got started as well. Someone back thousands of years ago saw someone riding on top of a horse, and because they didn't know that people could ride on horses, and had never seen something like that before, they jumped to the conclusion that the person was half man, half horse.
Now I know that it sounds silly today that a person would think that, but back thousands of years ago when these myths got started we weren't that rational, and we were prone to superstition, and when we saw something that didn't make sense to us, we would make stuff up and jump to a conclusion about what it was instead of trying to figure out just what we saw. Heck, we do that even today!
Now I won't say that this is actually got started in the first place, in fact there are probably a bunch of variables concerning how this myth got started, but the fact remains is that this is a myth that will live on in our hearts and our stories... and Disney movies.