Beginning in 2022, I've had the opportunity to prepare and deliver Chaburahs (short lectures) on Torah topics that are of interest me. I figured this would be a good place to store the source sheets and share them with those who may be interested. If there's a topic that interests you, or if you have any questions, you are welcome to email me at Doctor@BergenEndoCare.com.

2025

The Year Yom Kippur Split: The Wild Calendar Controversy of 921/922 CE

Impact of Timekeeping Technology on Halacha

A Fresh Look at Kiddush Levanah

How it's Made: the Jewish Calendar

2024

Does Anyone Actually Know what the Molad is?

What Causes the Moon to Shine?

"And I Don't Believe in Time"

Reyach Nichoach and the Mystery of Olfaction

2023

The Compelling Case for an Earlier Tzeis

Aliyah LiRegel and Ancient Travel

2022

The History of Alcohol and Drinking on Purim