Jeffrey T. Rasic

TL;DR: Analysis of the oldest genomes suggests that there was an early split within Beringian populations, giving rise to the Northern and Southern lineages, and that the early population spread widely and rapidly suggests that their access to large portions of the hemisphere was essentially unrestricted, yet there are genomic and archaeological hints of an earlier human presence.

TL;DR: A large-scale metagenomic analysis of plant and mammal environmental DNA reveals complex ecological changes across the circumpolar region over the past 50,000 years, as biota responded to changing climates, culminating in the postglacial extinction of large mammals and emergence of modern ecosystems as discussed by the authors.

TL;DR: In this article, PXRF technology was used to analyze 676 rhyolite artifacts from 123 sites in interior Alaska and identified ten distinct geochemical groups that appear to correlate with distinct geological sources.

TL;DR: In this article, an isotope-guided random walk approach was used to compare the strontium and oxygen isotope profiles to isotopic maps to reconstruct the movements of an Arctic woolly mammoth during the last ice age.