Suddenly the threat of nuclear attack from North Korea seems incredibly real to many people, and even the mainstream media …

http://www.healthrangerscience.com/2017-08-10-the-health-rangers-science-preparedness-guide-for-nuclear-fallout-survival.html

There has been a lot of concern about the Yellowstone supervolcano over the past few weeks due to the nearly …

http://www.healthrangerscience.com/2017-07-21-yellowstone-supervolcano-ready-to-blow-rational-analysis-says-its-unlikely-in-your-lifetime.html