Quark Expeditions, in association with Penguin Watch, is giving away a trip to Antarctica! Between April 25 and May 25, every day that you classify at least 10 images, you will receive an entry into a prize-draw to win an 11-day Antarctic Explorer: Discovering the 7th Continentexpedition from Quark Expeditions. Find out more about the details of the contest, and how to qualify for entry, at
And get marking those penguins right away away at