Published April 20, 2011
Explore zoomable maps of the U.S. Gulf Coast to see which beaches were hit worst by the oil spill last summer and how they're faring now. (Also see: "Gulf Oil Spill Anniversary: Hard-Hit Beaches Mostly Oil-Free.")
Mouse over the images to access zoom tools. "Home" icon returns picture to fully zoomed-out view.
Scientists recently captured a rare video of an oarfish, but what's the real significance of the underwater footage?
Skywatchers can witness the biggest supermoon of 2013 and several other lunar events this week.
Police are still looking for environmentalist Jairo Mora Sandoval's murderers, while the episode has more Costa Ricans talking about the links between poaching and drug trafficking.
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