Last week NASA's Goddard Space Flight Center published a two-part set of videos called A Selective History of Arctic Sea Ice Observations. These videos are short, simple, but extremely informative. And very nicely done, I may add. So now you must watch them!
And part 2:
NASA also released a video a couple of weeks ago, which I've overlooked, and it features my hero Dr. Tom Wagner putting the 2014 melting season in context. Is there a climate science communication award we can give this good man?