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There Is a Deadly Secret Hidden in This Fish's Parenting Plan

This is the stickleback. The males of the species have a reputation for being wonderful fathers. They are so baby-crazy that if their nests are empty they will steal the eggs of other males, just to get a little something to watch over. But, wait! Just how did their nests become empty in the first place?
» 7/08/15 6:30am 7/08/15 6:30am

Rapid Deevolution Creates Lake of Fully-Armored Fish in Just 50 Years

Lake Washington, the largest lake in the Seattle area, has long been home to a soft-skinned fish called the threespine stickleback. But over the past fifty years, the lake's population of sticklebacks has changed dramatically: today, most of the fish sport partial or full body armor, a throwback to their origins as… » 5/15/08 3:00pm 5/15/08 3:00pm