Welcome back to our Tech Tip series! Today, we’ll review one of the most essential tools in every toolbox, a multimeter.

A Chinese farmer has stunned the internet by building a working submarine in his backyard—without formal training or support. What started as a wild idea turned into a real underwater vessel, drawing ...

A "charged" metal hydride is still at least 90% metal and, as of today, 7% or so hydrogen. Energy density is not as good as a ...