Keith Nester is a former Protestant pastor who spent over 20 years in ministry before becoming Catholic in 2017. Now a full-time evangelist, author, and speaker, he helps others navigate the convert’s journey through his book The Convert’s Guide to Roman Catholicism and his YouTube channel and podcast Catholic Feedback. Keith leads Down to Earth Ministries and brings a bold, relatable voice to the faith—all from his home base in Cedar Rapids, Iowa.

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La Escuela de Traductores de Toledo (II): Ptolomeo, Euclides: traducciones de matemáticas y astronomía