Natan writes:
Regarding the discussion on the Daf about horns that can be used for a Shofar - you can share the following resource with your audience:
https://www.biblicalnaturalhistory.org/post/shofars
Best,
Natan Slifkin
The Kollel replies:
Thank you for sharing with our readers your meticulously researched article about horns that can and cannot be used for Rosh Hashanah, Rav Natan!
Best regards,
Rabbi Mordecai Kornfeld