Have you ever wondered how our modern calendar came to be? How about the possibility of a rogue asteroid or a doomsday comet that threatens life on earth?

Join Duncan and myself as we discuss the earliest attempts at a calendar, inaccuracies with our current calendar, and even the potential for a doomsday impact and how we can prevent it!

Find Duncan's book, Marking Time: The Epic Quest to Invent the Perfect Calendar, on Amazon: https://amzn.to/2U4widh

And visit Duncan on his website: http://www.duncansteel.com

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