United States Geological Survey

Iowa meteorite crater confirmed

(Phys.org) —Recent airborne geophysical surveys near Decorah, Iowa are providing an unprecedented look at a 470- million-year-old meteorite crater concealed beneath bedrock and sediments.

Mar 05, 2013 4.9 / 5 (14) 0 | with audio podcast

Unexplored Arctic region to be mapped

A scientific expedition this fall will map the unexplored Arctic seafloor where the U.S. and Canada may have sovereign rights over natural resources such as oil and gas and control over activities such as mining.

Sep 03, 2008 4.7 / 5 (6) 0