Simplify the following text for a Grade 10 native English-speaking person.
Original: A series of extant drawings show DÃ 1\/4 rer 's experiments in human proportion , leading to the famous engraving of Adam and Eve ( 1504 ) , which shows his subtlety while using the burin in the texturing of flesh surfaces .
Simplified: This is a series of drawings show DÃ 1\/4 rer 's experiments in human proportion , before he made his famous engraving of Adam and Eve ( 1504 ) .