Latest / Short Machshava On The Daf by Rabbi Yechezkel Hartman
Avoda Zara 41: The World is Round
The sources in Chazal, and the understanding of the Vilna Ga'on.
Source Sheet: https://drive.google.com/file/d/1RPzA0dvcEv73F_ksSCf1XT68olQvqbcI/view?usp=share_link
The skinny
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