After initially working to create a modernized replica of a Czechoslovakian 4-digit Metra M1T242 voltmeter, [Jaromir Sukuba] figured that while he was at it, he might as well create a voltmeter ...

But imagine a voltmeter so small that it can slip into a living cell and measure the voltage across the outer layer of structures known as organelles. That’s what a team of researchers at the ...