Professor Carl Renshaw and 11 students just completed an unanticipated venture into the flood-ravaged canyons of Boulder, Colo.

In a story about arsenic and whether any level of the naturally occurring element might be safe to ingest, Discover magazine speaks with a number of Dartmouth scientists who’ve done research on arsenic in drinking water and in food products.

Nature points to a new study co-authored by Dartmouth’s Mukul Sharma, a professor in the Department of Earth Sciences, that links the impact of a comet or meteor striking the Earth to the dramatic global climate change that occurred 12,900 years ago.

In a new study funded by the National Science Foundation, Dartmouth researchers and their colleagues report that f or the first time, a dramatic climate shift that has long fascinated scientists has been linked to the impact in Quebec of an asteroid or comet.

On June 18, Erich Os terberg left Alaska’s Denali National Park, where a collaborative Dartmouth-University of Maine-University of New Hampshire team had chronicled 1,000 years of regional climatic history.

Scientific progress has transformed Darwin’s simple evolutionary tree of life into a bush with a myriad of branches, representing phylogenetic relationships. Now the research of Dartmouth’s molecular palaeobiologist Kevin Peterson is telling us that the branches may all be in the wrong places.

Professors Jason Moore and Mukul Sharma assert that a high-velocity comet - not an asteroid - led to the demise of the dinosaurs.

Dartmouth professors Frank Magilligan and Carl Rensh aw are collaborating to understand the effects of Hurrican Irene on stream channel erosion and its repercussions on the land and the people.