Paleolithic Extinctions and the Taurid Complex (2010) Centaurs as a Hazard to Civilization (2015) Excerpted from Wolbach et. al (2018)   Astronomical Hypothesis for the YDB Impact Event Regarding the probability of a swarm of cometary fragments hitting the Earth, Boslough et al. (2013) claimed that the YDB event is “statistically and physically impossible,” whereas Napier […]

  As a rule, the Tusk is scrupulously clean of politics. There is a reference in my own blog bio to being a former conservative policy staffer in the US Senate, but that is background and not polemics. I am old fashioned and believe politics is generally if not inherently destructive of sound inquiry. The more political […]

The banner image above is Comet 73/P Schwassman-Wachmann fragmenting in orbit  ABSTRACT Intersection with the debris of a large (50-100 km) short-period comet during the Upper Palaeolithic provides a satisfactory explanation for the catastrophe of celestial origin which has been postulated to have occurred around 12900 BP, and which pre-saged a return to ice age […]