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Scaling up from the Internet of Things to the City of Things. Rethinking the kilogram after 125 years. And engineers develop a 20-cent centrifuge that could save lives in underdeveloped parts of the world. This is your weekly news brief.

The device could be used to diagnose diseases in areas where there is little infrastructure or electricity.

Researchers have managed to adapt the tractor beam technology into a handheld version that anyone can use—and even 3-D print at home.

Your next new car could come equipped with vehicle-to-vehicle communication technology. A new pumped hydro plant gets an OK to move forward. And scientists in Germany are testing a sensor to learn about the dynamics of avalanches. Rich Northrup has your weekly news brief.

Mind over matter as thoughts alone control a robotic arm. A device to harvest the energy from your car’s suspension system. And move over Mozart! We’ll show you music to write code by.

Too much voltage applied to a device is one of the reasons.

The lights allow for more potent, higher-yield plants.

Putting up computer controlled holiday lights can become addicting. It may not seem like it, and it won’t feel like it when you’re putting the lights up, but once you’re done you are never satisfied.