The oxygen content of the Earth's surface environment is thought to have increased in two
broad steps: the Great Oxygenation Event (GOE) around the Archean–Proterozoic boundary …

The Cambrian diversification of animals was long thought to have begun with an explosive
phase at the start of the Tommotian Age. Recent stratigraphic discoveries, however, suggest …

Abstract The Neoproterozoic era (1,000–542 Myr ago) was an era of climatic extremes and
biological evolutionary developments culminating in the emergence of animals (Metazoa) …

Australopithecines, dinosaurs, trilobites--such fossils conjure up images of lost worlds filled
with vanished organisms. But in the full history of life, ancient animals, even the trilobites …

The Cambrian “explosion” is a unique episode in Earth history, when essentially all the
animal phyla first appear in the fossil record. A variety of environmental, developmental …

The evolution and extinction of life are tied intimately to the oxygen state of the ocean, and
particularly to the presence of anoxic and H2S-containing (euxinic) water on a global scale …

Kermit the Frog famously said that it isnÕt easy being green, and in Living at Micro Scale
David Dusenbery shows that it isnÕt easy being smallÑexisting at the size of, say, a rotifer, a …

Winner, 2009 Victorian Premier's Literary Prize for Science Writing Among the major events
in evolutionary history, few rival in importance the appearance of animals. The Rise of …

We present a δ 13C record from the Anti-Atlas mountains of Morocco and place it in the
context of a detailed regional tectonostratigraphy. We place the litho-and chemostratigraphic …

Distinguishing Ediacaran trace fossils from tubular body fossils can be a challenge, and
several Ediacaran fossils previously interpreted as animal traces have been shown to be …