For the last year and a half, sea stars all along North America's Pacific coast - from Baja California all the way to Alaska - have been withering away into nothingness. Today, researchers announced they've found the culprit: it's a virus.
You're going to want to expand this gorgeous, high-resolution photo to full screen, and use it as your desktop wallpaper. This transparent critter is a brachiolaria, which is the second larval stage of many types of sea stars. The photo was taken by Alex Semenov in July 2013, in Russia's White Sea.