Holiday's greetings from iGEM - a genetic engineering competition between international university bioengineering teams...
Christmas is not just celebrated by Earthlings, the International Space Station, in orbit, celebrates it too. Here is an image of the ISS' Christmas tree (on the ceiling), tweeted by Canadian astronaut Chris Hadfield (@Cmdr_Hadfield) ...
Technopreneurs at Adafruit posted an image of a Christmas tree created by a customer using one of their LED products...
Finally, last and by far our favorite - a Twitter controlled, Arduino-run, laser cut LED wreath - see video below...