Snow bacteria
Snowflakes form around particles called nucleators, which can be anything from dust and soot to bacteria.  Some research showed that as much as 85% of nucleators in some regions are bacteria.  Maybe that's another reason why people say you shouldn't eat snow.  (via Radiolab) #nature

DNS security
On the Media did a story about the inner workings of the internet's Domain Name System and the various security protocols involved in keeping the system running: 
So they have a key to a safety deposit box, which is inside the safe that they can't open, which is inside an insanely high secure facility, which they, hopefully, can't get into. So the person who knows the combination for the safe can't get in the room and can't get in the facility. The people who have the actual keys can't get anywhere, but the people who can get in the room don't know the combination or have the key. So, I mean, it does sound like something out of Oceans 11.
It's easily the most interesting thing I've heard about a really important thing that has almost no bearing on my day-to-day life. #technology