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Earth & Space

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What causes an Ice Age to end?

Earth's climate over most of the last million years was much colder than the present. Massive ice sheets repeatedly covered large parts of North America and Eurasia. Periodically, these ice sheets melt when average global temperatures climb sharply to levels of today. Scientists have long... click to read more

  • Russell Drysdale | Associate Professor at School of Geography, University of Melbourne, Australia
Views 73
Reading time 3.5 min
published on Dec 1, 2020
Storm Defense with Mangroves

Roughly one in five of us lives in a coastal area at risk from tropical cyclones. For decades investments in early warning systems have allowed us to move out of harm's way, reducing the number of lives lost. Despite this progress, we remain unsuccessful at... click to read more

  • Alejandro del Valle | Assistant Professor at Department of Risk Management and Insurance, Georgia State University, Atlanta, GA 30302, USA
  • Mathilda Eriksson | Visiting Research Associate at Department of Risk Management and Insurance, Georgia State University, Atlanta, GA 30302, USA
Views 269
Reading time 3 min
published on Nov 25, 2020
U.S. Mineral Supply Chain Security in the Age of Pandemics and Trade Wars

The COVID-19 pandemic highlights the fragility of global supply chains and underscores the risks of supply disruptions during a crisis. This is only the most recent reminder of such risks to economies that are heavily reliant on imported goods and materials, with supply chain disruptions... click to read more

  • Nedal T. Nassar | Chief, Materials Flow Analysis Section at 1National Minerals Information Center, U.S. Geological Survey
  • Steven M. Fortier | Senior Policy Advisor at National Minerals Information Center, U.S. Geological Survey; Office of Science and Technology Policy, Executive Office of the President of the United States
Views 1366
Reading time 3.5 min
published on Nov 23, 2020
Extreme glacier melt and climate change

Glaciers around the world are melting faster than in any previous decade since measurements began. Glaciers form when snow accumulates over many years and compresses into ice. Glaciers accumulate snow in the winter, and then melt ice in the summer. Cold temperatures, more snow, or both,... click to read more

  • Lauren J. Vargo | Research Fellow at Antarctic Research Centre, Victoria University of Wellington, Wellington, New Zealand
Views 538
Reading time 3 min
published on Nov 10, 2020
How to know slow slip events and anticipate future large earthquakes

The technology of positioning ourselves with satellites, called GNSS (Global Navigation Satellite System) positioning, is now inseparable from our lives. If we apply high-precision analysis technology for GNSS positioning, we can see the plate tectonics at a cm/year-order speed. When this high-precision observation is performed... click to read more

  • Yusuke Yokota | Lecturer at Institute of Industrial Science, University of Tokyo, Tokyo, Japan
Views 639
Reading time 3 min
published on Oct 22, 2020