Stone tools and mastodon bones occur in an undisturbed geological context at the Page-
Ladson site, Florida. Seventy-one radiocarbon ages show that~ 14,550 calendar years ago …

Abstract Background Late Pleistocene North America hosted at least two divergent and
ecologically distinct species of mammoth: the periglacial woolly mammoth (Mammuthus …

Glyptodonts were giant (some of them up to~ 2400 kg), heavily armoured relatives of living
armadillos, which became extinct during the Late Pleistocene/early Holocene alongside …

The evolutionary history of the largest salamander family (Plethodontidae) is characterized
by extreme morphological homoplasy. Analysis of the mechanisms generating such …

Long-held ideas regarding the evolutionary relationships among animals have recently
been upended by sometimes controversial hypotheses based largely on insights from …

Since the late eighteenth century, fossils of bizarre extinct creatures have been described
from the Americas, revealing a previously unimagined chapter in the history of mammals …

Taphonomic biases dictate how organisms are represented in the fossil record, but their
effect on studies of vertebrate diversity dynamics is poorly studied. In contrast to the high …

Evolutionary relationships among the eight major lineages of Mollusca have remained
unresolved despite their diversity and importance. Previous investigations of molluscan …

Abundant skeletal remains demonstrate that lambeosaurine hadrosaurid, tyrannosaurid,
and troodontid dinosaurs lived on the Alaskan North Slope during late Campanian—early …

The determination of nuclear DNA sequences from ancient remains would open many novel
opportunities such as the resolution of phylogenies, the sexing of hominid and animal …