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What’s the Best Online Backup Service?

Using an online backup service to back up your computer is not only convenient, it protects your data against big incidents like theft, fire, and natural disaster. There are lots of backup services out there, but we like Bac…

What Is Ray Tracing?

Recently a demo from Epic, the makers of the Unreal game engine, raised eyebrows for its photo-realistic lighting effects. The technique is a big step forward for ray tracing. But what does that mean?
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