The recent Y-chromosome bottleneck may have been caused by the low tempertures of the Younger Dryas cooling event 12,900 years ago.

A severe bottleneck in the human Y-chromosome occurred after the Younger Dryas cooling event.

Discussion of the creative process that led to the development of the Glacier Ice Impact Hypothesis, including insights that helped to change the direction of the research.

Suposedly, a large object from the Oort Cloud crashed into the Earth 12,800 years ago and caused a world-wide flood that filled the Mediterranean basin.

The Younger Dryas Impact Hypothesis proposes that one or more comet fragments impacted the Earth 12,900 years ago killing the megafauna and triggering a global cooling event.

The Tunguska event was caused by a meteoroid explosion over Siberia on the morning of June 30, 1908.

The elliptical geometry of the Carolina Bays indicates that the bays originated as inclined conical cavities.

Examination of Raymond Kaczorowski's 1977 thesis that compares the Carolina Bays to oriented lakes.