While smartphones are awesome little computers, one of the things that really makes them useful is their built-in sensors - many apps are made possible via a phone's accelerometer, gyroscope, GPS, ...

It is cold in the winter, so it seems that somehow indoor air is getting worse as he is heating up, but there is something that it is hard to understand how much carbon dioxide is actually filled.

Vernier has partnered with Variable to bring the latter company's iPad-based modular wireless sensor platform, Node, to science classrooms. The Node sensor platform connects to an iOS device via ...