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Auroras will get a CT scan, Nasa will fly rockets into them. Here's why

Nasa is launching a unique rocket mission to perform a 3D CT scan of the northern lights. The study aims to map the electrical circuits that impact our satellites and GPS.

The 9 best vacuums for every home, floor type, and budget

We tested cordless, upright, and robot vacuums to find the best models for dust, crumbs, and pet hair. Our top picks are ...