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Sargassum, an important part of the Gulf of Mexico and Atlantic marine ecosystems, has been showing up in unprecedented amounts and in places it hasn't been before. The most likely culprit: climate change. Read more about the problem in this piece for Newsweek. Image courtesy Jim Gower, Institute of Ocean Sciences, Canada.

Scarlet Colley is known as the dolphin whisperer in Port Isabel, Texas. She and George Colley run dolphin watch boats, but what they don't do is run the boats up on the animals. Read more about their dolphin-friendly approach in this piece for Texas Parks & Wildlife Magazine.