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Dark Matter and the Stuff Humans are Made of

-- | May 28, 2014

Question:  If dark matter does not emit or reflect any kind of light, (As I have heard from Neil deGrasse Tyson’s Cosmos series) then how come we can see [ourselves in] a mirror?  — Cyrus

Answer:  Scientists love to perform experiments that clear prove a fact.  One interpretation of this observation is that this demonstrates that we are definitely not made of dark matter!  So, simply by looking in a mirror you have proven something fundamental about the material that humans are made of.  Congratulations!

Jeff Mangum