Articles by Asher Elbein

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.

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…