Pesachim 2a-2b
Why is the tractate Pesachim plural? Why are many tractates plural? \u2022 Why must we search with a candle, and does a flashlight qualify as a candle? \u2022 When must we search for chametz, twilight or night? \u2022 Why did the Rabbis require us to search for chametz before Pesach? \u2022 Black holes: A biblically revealed phenomenon \u2022 Why did the Sages call it Pesachim instead of the Biblical name, Chag HaMatzos?