Simplify the following text for a Grade 11 native English-speaking person.
Original: Others who made significant contributions to understanding the event in the century that followed include Florentino Ameghino and George Gaylord Simpson .
Simplified: Others who made significant contributions to understanding the event in the century that followed include Florentino Ameghino , W. D. Matthew , W. B. Scott , Bryan Patterson , George Gaylord Simpson and S. David Webb .