Just wait. Someone will notice Joshua 10 verse 13, (The sun delayed going down about a full day), and demand a new theory of Newtonian mechanics that allows for the non-conservation of angular momentum. This conservation is 'only a theory' which 'has never been proven' after all.
Or maybe they will just challenge the heliocentric model of the solar system. All that astronomy may just be unproven theories as well...
Try this essay for a possible explanation of the long day.
http://www.zealllc.com/2002/astrology.htm