We finally understand (mostly at least) how the biggest animals on the planet eat. This article describes the fascinating process that rorqual whales (e.g. blue whales, humpback whales, fin whales) go through to get a little food into their bellies.
It is especially interesting to me that we are barely (in the past decade) getting enough information to piece this process together.
http://www.americanscientist.org/issues/issue.aspx?id=8779&y=0&no=&content=true&page=2&css=print