A Discourse Presented to the Most Serene Don Cosimo II., Great Duke of Tuscany, Concerning the Natation of Bodies Vpon, and Submersion In, the Water.

"A Discourse Presented to the Most Serene Don Cosimo II., Great Duke of Tuscany" by Galileo Galilei is a scientific exploration from the 1600s that investigates why things float or sink, presenting an argument against old ideas about gravity and density. It begins with Galileo talking to Don Cosimo II before addressing the argument of why things float. Galileo suggests that whether something floats depends on how heavy it is compared to water, and not on its shape, so that the author plans explain his ideas using logic and math. By defining terms, he sets out to prove his thinking over just arguing.