Earth Impacts on Instagram: "A hypothetical miles-high tsunami would represent an extreme breakdown of known ocean physics. For a wave of that vertical scale to form and maintain massive speed and coherence, the energy input would need to exceed anything observed in Earth’s geological record—far beyond mega-earthquakes or asteroid impacts. At that height, the wave would no longer behave like a conventional tsunami. Gravity, atmospheric drag, and structural instability would cause the crest to co