When Science Seems to Contradict Halachah; Has Nature Changed?
Verses in Tanach
Talmud / Midrash and Commentaries
Chullin 47a - Tereifot
Chullin 49b
Megilah 21a
Sanhedrin 69b - Male puberty
Yevamot 34b - Birth after a ten year gap
Yevamot 75b
Yevamot 80 - Premature birth
Maharam Chullin 47a "Kol"
Rosh Chullin 3:16-18
Tiferet Yisrael Shabbat 9:1
Tosafot Avodah Zarah 24b s.v. "Parah" , Chullin 47a "Kol", Moed Katan 11a s.v. "Kevara"
Yam Shel Shelomo Chullin 3:55, 8:12
Post Talmud / Midrash, Pre-Rishonim
Otzar haGaonim Gittin Teshuvot #376
Sefer haEshkol 126a (1938 ed. Page 52) - cites Rav Sherira Gaon
Mishneh Torah and commentaries
Hilchot Shechitah 10:12-13 - Tereifot
Kesef Mishneh Hilchot Dei'ot 4:18
Rishonim [Pre-"Code of Jewish Law"]
Tur, Shulchan Aruch ["Code of Jewish Law"] and Commentaries
Beit Yosef Even haEzer 156, 178 (end)
Rama Even haEzer 156:4
R' Akiva Eiger Yoreh Deah 376:1 - citing the Maharil
Magen Avraham Orach Chaim 173:1, 179:8
Mishnah Berurah 173:2; 179:18
Mishnah Berurah / Bei'ur Halachah 331 - on Metzitzah
Acharonim [Post-"Code of Jewish Law"]
Recent Authorities
Aruch haShulchan Yoreh Deah 264:19
Chazon Ish Even haEzer 115:4 - Premature birth
Chazon Ish Orach Chaim 39:10
Chazon Ish Yoreh Deah 155:4 - Premature birth
Daat Kohen 140
Har Tzvi Yoreh Deah 214
Igrot Moshe Choshen Mishpat 2:73:4; Even haEzer 2:3; Yoreh Deah 3:52:1
Kehillot Yaakov Shiurin deOrayta Anaf 11, 13
Minchat Yitzchak 9:97-98
"Shiurei Mikvah" of Grach Na'eh, pg. 47
Tzitz Eliezer 8:15:10(:7); 10:25:19:4
Yabia Omer 1:Yoreh Deah:8:4-6
Contributors to this set of references
To add sources or to suggest topics for source material, please e-mail me [Mordechai Torczyner] at: 
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