作者: Charlotte R. Carey

The International Atomic Energy Agency (IAEA)plays a crucial role in supporting U.S. nuclear nonproliferation goals through its safeguards and nuclear security programs. The Department of State (Stat …

In this collection, the authors begin by discussing the Quaternary, the most recent geological period of time in Earth’s history spanning the last 2.588 million years. The Quaternary System is subdiv …