Butterfly Stroke - Fly or Swim ?

Swimming exists since the Stone Age ! Have you ever thought about that ? Yes, in the Stone Age men swam in rivers and lakes looking for food ! In the Olympic Games,swimming is present since Athens 1896 ! It is one of the disciplines that distributes most medals,with 32 events (16 for both men and women) in butterfly stroke,backstroke,breaststroke and freestyle.

http://www.enjoy-swimming.com/swimming-strokes.html

By the way,Michael Phelps,the american athlete ,is the swimmer who has already taken the Olympic Games Podium several times.Moreover  Michael Phelps  is the Olympic Record Breaker and The Record Holder of Record Holders ! He has already got 22 medals around his neck ! He has just arrived in Rio De Janeiro to compete once again ! 

 Why is Michael Phelps considered to be the G.O.A.T ? How old was Michael Phelps when he competed in his first Olympics ? How old is he nowadays ?Has ever thought of retiring from the Games ? Has he got only gold medals while competing at the Olympic Games ?  How many swimming styles does he compete for at the Olympic Games? Has he got only gold medals ? You can read a lot of information about this winner clicking on the links below and then you are going to answer these questions I have asked you before,ok ? 

http://www.biography.com/people/michael-phelps-345192

https://www.theodysseyonline.com/goat