A new provocative theory among the scientific community is life on Earth actually began on Mars. Derrick Pitts, chief astronomer and planetarium director at Philadelphia's Franklin Institute, ... more 
A new provocative theory among the scientific community is life on Earth actually began on Mars. Derrick Pitts, chief astronomer and planetarium director at Philadelphia's Franklin Institute, discusses the theory -- in its infancy -- with the "CBS This Morning" co-hosts. less 
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Mon, Sep 2, 2013 9:11 AM EDT