Polar vortex: The science behind the cold

The polar vortex, a swirl of low-pressure air six miles up in the atmosphere, blasted much of the American Midwest and Northeast in late January 2019 with temperatures cold enough to bring on frostbite within minutes.

Q&A: Designing a better local tsunami warning system

On a Friday afternoon in the spring of 2011, the Tōhoku-Oki earthquake shook northeastern Japan for six minutes and shifted the country's main island by 8 feet. Minutes later, residents began receiving tsunami warnings through ...

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