A survey of 40,000 existing and 3,700 planned dams finds that the structures could fragment fish habitat in the Amazon, Niger, Congo, Salween and Mekong river systems by 25% or more.
Articles by Asher Elbein
Asher Elbein is a journalist and short fiction writer based in Austin. He writes about natural history, science, and culture.
Romer's tree frog is, in every respect, an animal that keeps out of the way. Start with its size: averaging just 1.5 to 2.5 centimeters (0.6 to 1 inches) in…
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