The Karoo basin of South Africa exposes a succession of Upper Permian to Lower Triassic
terrestrial strata containing abundant terrestrial vertebrate fossils. Paleomagnetic/…

The rise of atmospheric oxygen (O2) concentration during the Precambrian eon (~ 4500 to~
550 million years ago) was closely tied to biological evolution. Additional changes in …

A catastrophic extinction occurred at the end of the Permian Period. However, baseline
extinction rates appear to have been elevated even before the final catastrophe, suggesting …

… Peter Ward is a paleontologist, someone who has spent a lifetime looking at his feet to
pry old bones from ancient outcrops and walk backward in time. Paleontology is a science of …

Click here to open pdf in another window PDF Link PDF for Effects of global atmospheric
perturbations on forest ecosystems in the Northern Temperate Zone; Predictions of seasonal …

Relationship of Hearing Loss and Dementia: A Prospective, Po... : Otology & Neurotology
Relationship of Hearing Loss and Dementia: A Prospective, Population-Based Study : Otology …

The Permian-Triassic transition in the Karoo Basin of South Africa was characterized by a
rapid and apparently basin-wide change from meandering to braided river systems, as …

Purpose: The goal of this study was to examine the effect of tobacco use on disease recurrence
(local/regional recurrence, distant metastasis, or second primary) among patients with …

The end-Triassic mass extinction is one of the five most catastrophic in Phanerozoic Earth
history. Here we report carbon isotope evidence of a pronounced productivity collapse at the …

Microorganisms are abundant in the upper atmosphere, particularly downwind of arid regions,
where winds can mobilize large amounts of topsoil and dust. However, the challenge of …