Hydroponics can be dirt cheap (no pun intended) — if you want to DIY it, it can be as simple as drilling holes in a food-grade plastic tub, filling it with a fertilizer solution, and waiting.

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› by Signe Brewster and James Austin After testing 14 soldering irons, we ...

Arduino is a popular open-source development board used by engineers, hobbyists, and makers to develop electronic projects and prototypes easily.

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If you already wear a retainer, though, Winter suggests using it to create a DIY whitening tray every now and then by using just the Opalescence syringe-gel refills: “Put a little stream of ...