A paper published in July 2021 used computer simulations to examine the effect of ice sheet thickness on the formation of the Hiawatha crater in Greenland. This presentation compares the results of the simulation with actual experimental impacts

This presentation examines the timing of the flow of water from Lake Agassiz through an eastward outlet by the St. Lawrence river and proposes that an extraterrestrial impact by the Great Lakes helped to open this path.

A presentation about the Younger Dryas Impact Hypothesis as a cohesive and comprehensive explanation for the megafaunal extinction 12,900 years ago. It concludes with the Younger Dryas Rap by AZ Cool

The atmosphere of the Earth has changed several times under the influence of temperature-dependent chemical reactions, volcanic activity and living organisms.

This presentation discusses evidence of the extensive fires that were caused by an extraterrestrial impact 12,900 years ago, according to the Younger Dryas Impact Hypothesis.

This presentation examines several publications that have reported a large platinum anomaly at the Younger Dryas Boundary, leading to the conclusion that one or more meteorites struck the Earth 12,900 years ago.

This presentation gives an overview of my new book entitled The Neglected Carolina Bays: Ubiquitous Geological Evidence of a Cataclysm

A rapid sea level rise occurred at the onset of the Younger Dryas cooling event 12,900 years ago. It may be possible to estimate the energy of the extraterrestrial impact from the volume of meltwater.

This presentation examines the way in which scientists have interpreted the Carolina Bays over the last 90 years and describes the relationship of the emplacement of the Carolina Bays and the extinction of the megafauna 12,900 years ago.

A recent bottleneck in the genetic diversity of the human Y chromosome indicates that as recently as 7,000 years ago women outnumbered men by a ratio of 17 to 1. This presentation examines the collapse of the ecosystems after the Younger Dryas and the effect that it had on humans.