San Francisco Zoo Penguins Sing 'Jingle Bells' (VIDEO)

Let's be honest. Penguins are pretty much the coolest arctic bird out there. Not only have they managed to successfully embrace gay marriage before their human counterparts, but they can also sing Christmas carols. The San Francisco Zoo recently released a video of its adorable crop of Magellanic penguins squawking "Jingle Bells" in unison, and it's pretty darn heartwarming. We dare you not to crack a smile. Read More... More on Video