The most recent deglaciation of the North American Ice Sheet Complex (NAISC: comprising
the Innuitian, Cordilleran, and Laurentide ice sheets) offers a broad perspective from which …

Two fundamental questions about the ice-age climate system await satisfactory resolution.
First, if summer solar radiation intensity truly controls the orbital signature of the last glacial …

Archaeologists and researchers in allied fields have long sought to understand human
colonization of North America. Questions remain about when and how people migrated …

The evolution of past global ice sheets is highly uncertain. One example is the missing ice
problem during the Last Glacial Maximum (LGM, 26 000-19 000 years before present)–an …

Abstract The Laurentide Ice Sheet was the largest global ice mass to grow and decay during
the last glacial cycle (~ 115 ka to~ 10 ka). Despite its importance for driving major changes …

Future sea-level rise poses an existential threat for many river deltas, yet quantifying the
effect of sea-level changes on these coastal landforms remains a challenge. Sea-level …

Little is known about woolly mammoth (Mammuthus primigenius) mobility and range. Here
we use high temporal resolution sequential analyses of strontium isotope ratios along an …

Ancient Native American ancestors (Clovis) have been interpreted as either specialized
megafauna hunters or generalist foragers. Supporting data are typically indirect (toolkits …

The Clovis-first model for the peopling of the Americas by∼ 13.4 ka has long invoked the Ice-
Free Corridor (IFC) between the retreating margins of the Cordilleran and Laurentide ice …

A series of publications purport to provide evidence that the Earth was subjected to an
extraterrestrial event or events at∼ 12.9 ka creating an environmental cataclysm and the …