Particularly in the First World, it's amazing how fragile our world is. Remember how upset we get if our cell phones don't work, or our computers get glitchy? So imagine if the electrical grid collapsed, or the fuel or food supply was curtailed, only for a few days, much less, some far more devastating apocalyptic kind of event?

We see it in natural disasters, like tsunamis, or earthquakes, or floods or tornadoes. We get a glimpse, but only a glimpse, of what might happen.  But are we prepared for any of these kinds of disasters, or should we be? 

Were Katrina and New Orleans and Sandy only outliers or a harbinger?  And if it is the later, what should we know about trying to survive in a post apocalyptic world?

Oxford research scientist, Dr. Lewis Dartnell gives us that information in  The Knowledge: How to Rebuild Our World from Scratch.

My conversation with Lewis Dartnell: