Why Do Trees Explode in the Middle of the Night? 🌲💥 In this video, we explore the terrifying phenomenon of exploding trees and the physics of freezing that turns forests into a battlefield. When a polar vortex hits and temperatures plunge, the expanding sap inside a tree creates massive internal pressure. This isn't fire or a weapon—it is a nature mystery driven by thermal expansion and contraction. We dive deep into the science of winter to explain how frost cracking and cold splitting occur.