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Humans have harvested the sea for tens of thousands of years, but only in the past few centuries have we begun to take a big toll on ecosystems. The two food webs below show predatory relationships among life-forms in the northern Adriatic Sea.

Flu season is just around the corner in the northern hemisphere. But for birds and pigs, it's flu season year round.

Neodenticula seminae, a microscopic strand of photosynthesizing plankton, is common in much of the northern Pacific Ocean. [More]

By Timothy Gardner WASHINGTON (Reuters) - Global warming will likely open up coastal areas in the Arctic to development but close vast regions of the northern interior to forestry and mining by mid-century as ice and frozen soil under temporary winter roads melt, researchers said. [More]