This is also the time to look over various lists "Best of 2012..."
Since I like all things visual one of my favorite is Best Science Stories of 2012 - in pictures
Science meets Art under the Lens - wonderful pictures!
This one of Aloin cells looks like a watercolor painting:
WIRED has posted The Best Scientific Figures of 2012.
National Geographic Best micro-photos 2012
For some reading - best long reads of 2012 from New Scientist.
This is my list of favorite math videos:
The Surprising Menger Sponge Slice by George Hart
From his daughter's Vi Hart's popular videos I liked the best Snowflakes, Starflakes, and Swirflakes:
<iframe width="560" height="315" src="http://www.youtube.com/embed/8EmhGOQ-DNQ" frameborder="0" allowfullscreen></iframe>
The Catenary - Mathematics All Around Us:
<iframe width="560" height="315" src="http://www.youtube.com/embed/AYIQYZuQNMw" frameborder="0" allowfullscreen></iframe>
And some videos just for fun:
Amazing close-up card magic by Lennart Green