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Published June 24, 2012, 10:10 AM

Astro Bob blog: Lowly lichens survive 18-month space odyssey

What’s crusty, grows on bare rock and appears barely alive? Lichens. And what survived a year and a half in life-sucking outer space? Lichens again!

By: Bob King, Duluth News Tribune

Click here to read Astro Bob.

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