Rav Nachum Rabinovitch and the Art of Ancient Dyeing

Dr. Baruch Sterman, founder of the @Ptil Tekhelet Institute, tells the story of Rav Rabinovitch's pivotal role in the discovery of the tekhelet - and an episode of "The Worst Jobs in History," a 2004-2006 BBC series.

Streamlining Services: What Can we Learn from High Holidays 5781?

Many synagogue goers found the abbreviated High Holiday services we recently concluded quite appealing. Need we eventually go back to the way it was before coronavirus? Not really, argues Moshe Kurtz, surveying the substantial halakhic support for shortening the services every year.

When the Beggar Knocks

Avi Killip explores three Talmudic stories dealing with the feelings of discomfort that can be involved in helping the poor, even when we know it’s the right thing to do.

Wisdom and Human Pretention: The Riddle of Shlomo and its Resolution

Special for Sukkot, we are honored to publish this piece by Rav Nahum Rabinovitch zz"l, appearing first the first time in print. Special thanks to Elli Fischer for translating and Koren for permission to publish.

Return… Again? Theories of Twice-Baked Teshuvah

Lehrhaus founder Shlomo Zuckier examines the debate about whether we can repeat Teshuvah for the same sin.

Signing Up for a COVID-19 Vaccine Trial

May one opt to participate in a potentially dangerous vaccine trial? This theoretical halakhic question has suddenly become ll-too-urgent. Sharon Galper Grossman and Shamai Grossman explore.

Did Rashi Draw the Diagrams in his Commentary to Eruvin?

Rashi’s commentary to Eruvin contains many explanatory diagrams. In anticipation of the Daf Yomi cycle’s study of the tractate beginning tomorrow, Eli Genauer shares some manuscripts that shed light on whether Rashi drew these pictures.

The Tefillin Strap Mark: In Search of an Obscure Minhag

In tribute to his son's hanahat tefilin and Bar Mitzvah, Lehrhaus Consulting Editor Jeffrey Saks explores a little-known, mysterious practice that appears in Agnon's short story Two Pairs.

Confronting God on Tishah Be-Av in Yehudah ha-Levi’s Yom Akhpi Hikhbadti

Yosef Lindell examines how Yehudah ha-Levi's kinnah about the bubbling blood of Zechariah modifies the story found in Talmudic sources and thus tackles the question of theodicy.

The Invention of Jewish Theocracy: A Review of Alexander Kaye’s New Book

What motivated the first Ashkenazic Chief Rabbi of Israel, Rav Herzog, to work tirelessly on the seemingly quixotic project of running the modern State of Israel on the basis of Halakhah? Reviewing Alexandar Kaye's new book on the subject, Rabbi Shalom Carmy explains.