On her morning walk to school, a high schooler notices a patch of greenery in her neighbor’s yard. But the plants don’t look quite as green and healthy as she thinks they should. To see if she’s right, she puts down her backpack and pulls out STELLA, a DIY gizmo not much bigger than a smartphone.
Click here for original story, STELLA: NASA’s DIY Educational Gadget for Measuring Plant Health
Source: NASA Goddard Center