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GPS jamming and attacks on other global navigation satellite systems (GNSS) are becoming increasingly common as geopolitical crises escalate.

If you want to measure a climate trend, one thing you certainly have to account for is the seasons. It would be unwise to take one measurement in July, a second measurement in December, and declare that we are descending into an ice age. The same is true for measuring ground deformation. There is seasonal movement you have to consider, including in Yellowstone National Park.

There has been little geothermal monitoring within Yellowstone’s famous hydrothermal basins. The lack of such data prevents scientists from tracking activity that may lead to hydrothermal explosions—essentially steam bursts—which are an underappreciated hazard in Yellowstone National Park.

Fiber optics began as a concept nearly 200 years ago. Today, it is a technology used by nearly every industry including communications, healthcare,...

Richard Aster’s profile on The Conversation