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Continue to ChatA Murder Over Mars: Did Johannes Kepler Poison Tycho Brahe? http://wordpress.jmcgowan.com/wp/a-murder-over-mars-did-johannes-kepler-poison-tycho-brahe/
A Murder Over Mars: Did Johannes Kepler Poison Tycho Brahe? http://wordpress.jmcgowan.com/wp/a-murder-over-mars-did-johannes-kepler-poison-tycho-brahe/