/u/Biermoese's posts in /r/askscience
Reflection of seismic shock waves from the earth's solid core tell us the earth's core is, well, solid. But how can we know that the earth's core is not actually hollow inside?
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Is it theoretically possible for science to modify my DNA in a way that from tomorrow, I'd grow a different hair color?
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Is the carbon footprint of a passenger flight proportional to the distance travelled? Or is most fuel consumed during start and landing?
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