geochemical evidence

Study uncovers new evidence for assessing tsunami risk from very large volcanic island landslides

The researchers used the geological record from deep marine sediment cores to build a history of regional landslide activity over the last 1.5 million years….

Plankton key to origin of Earth's first breathable atmosphere

In a paper to appear in the online Early Edition of the Proceedings of the National Academy of Sciences (PNAS), Ohio State University researcher Matthew…

Absence of evidence for a meteorite impact event 13,000 years ago

The Younger Dryas is an abrupt cooling event in Earth's history. It coincided with the extinction of many large mammals including the woolly mammoth, the saber…

Rise of Oxygen Caused Earth's Earliest Ice Age

Scientists from the University of Maryland, including post-doctoral fellows Boswell Wing and Sang-Tae Kim, graduate student Margaret Baker, and professors Alan…