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After starting my career at PCMag as an intern more than a decade ago, I’m back as one of its editors, focused on managing laptops, desktops, and components coverage. With 15 years of experience, I ...

Dell, HP, and Lenovo also do this, but you should always double-check exactly what you're getting and whether you can buy it for less at other retailers. Brands like Lenovo adjust their prices ...

Brownian diffusion is a ubiquitous mechanism of transport for ions, molecules and submicrometre particles. It can limit the rate of chemical reactions as well as determine the efficiency of ...