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Why isn't there any sound in space? An astronomer explains why in space no one can hear you scream

By Chris Impey, University Distinguished Professor of Astronomy, University of Arizona
Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to

How far can sound travel through space, since it’s so empty? Is there an echo in space? – Jasmine, age 14, Everson, Washington

In space, no one can hear you scream.

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