[LokisMischief] wrote in to the tip line to let us know about this incredible home made CO2 laser ... [ThunderSqueak] does make a note on the to do list about doing a good laser-y demonstration ...

and some CO2. We’re guessing he needed another use for his supercritical drying chamber, so after looking over a few patents, he decided to make pure caffeine in his garage. The extraction began ...

Consumer technology writer Gareth Butterfield tests the two latest smart monitors from home automation company ... the Meter Pro and the Meter Pro CO2 Monitor. The CO2 monitor costs £59.99 ...