A new sensor has been designed to replace mechanical float switches. The Leveltrak is an electronic non-floating sensor. It detects level without any moving parts. Using capacitative sensing ...

Inspired by dandelion seeds, they can be dispersed by drones across a large area to monitor issues like climate change and forest fires. Jesse Orrall (he/him/his) is a Senior Video Producer for CNET.

Small sensors powered only by sunlight could float in the stratosphere indefinitely and make weather-related measurements. There is a known effect for levitating flat objects with two sides called ...