Who is Simone Biles and why has she been called the greatest gymnast ever?

Simone Biles became the winningest female gymnast at the World Championship level in history. She has won the gold medal in the all-around competition at the World Championships every single year in which she's competed since 2013. In fact, she has not lost an all-around competition in which she has competed. She has raised the degree of difficulty for the entire sport of gymnastics.

Simone Biles is the greatest gymnast of our time or any time in history. She proved that Sunday at the World Championships, where she raked in her 24th and 25th world medals, both gold