Peter Troch is Biosphere 2 science director and the principal investigator of the Landscape Evolution Observatory. He is a professor in the department of hydrology and water resources at the UA.

died Jan. 29, when American Airlines Flight 5342 collided midair with U.S. Army helicopter over the Potomac River near Ronald Reagan Washington National Airport. The aircraft went down in the ...

Although recent vaccine approvals have raised hopes of a turnaround in the pandemic later this year, renewed waves and new variants of the virus pose concerns for the outlook. Amid exceptional ...

Note: Real effective exchange rates are assumed to remain constant at the levels prevailing during October 14-November 11, 2019. Economies are listed on the basis of economic size. The aggregated ...

Warsaw's Kordegarda gallery has unveiled an exhibition entitled "Jan Matejko: Preliminary Sketches" to mark 185 years since the birth of one of Poland's most prominent painters and to commemorate ...

Chatham House, the Royal Institute of International Affairs, is an independent policy institute based in London. Discover what we do, visit our website today.

Equus How did horses become some of the greatest athletes in the animal kingdom? Researchers at Johns Hopkins Medicine have pinpointed a genetic mutation and evolutionary process that occurred ...