Tunguska Event: The Craterless Blast Over Siberia

In 1908, something exploded over Siberia, flattened thousands of square kilometers of forest, and left no crater—so what actually hit Earth? In this episode, we unravel the Tunguska Event, the asteroid airburst mystery, the comet-vs-asteroid debate, and why this craterless blast still matters for planetary defense today. Listen now to hear how scientists turned a vanished disaster into one of the greatest clues in impact science.

In this episode, we dig into the Tunguska Event, the craterless blast over Siberia that flattened thousands of square kilometers of forest in 1908. We explore the leading asteroid airburst explanation, the lingering comet-vs-asteroid debate, and why Tunguska still shapes how scientists think about planetary defense.

• A high-altitude airburst can devastate a huge region without leaving a crater
• Leonid Kulik’s field investigations helped turn a mystery into evidence
• Modern models point to a stony asteroid, but some uncertainty remains
• Tunguska is a real-world reminder that near-Earth objects matter
• The event is a key case study in astronomy, geology, and impact science

Chapter labels:
The 1908 Siberian blast
Why there’s no crater
Leonid Kulik and the first investigations
Asteroid or comet?
What Tunguska means for planetary defense

Related resources and links:
• [Episode page](#)
• [Transcript](#)
• [NASA: Tunguska Revisited](#)
• [Britannica: Tunguska Event](#)
• [More science episodes](#)

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