A New Wildfire Watchdog
Cars That Think
OCTOBER 26, 2021
Just thinking about the crew of people needed to tramp around to change all those batteries is exhausting, and to actually do it would be prohibitively expensive and impractical. A hundred years ago, centimeter-scale tilt switches used a conductive blob of mercury rolling along a glass tube to close an electric circuit.
82 
Let's personalize your content