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Fragmented habitat makes it hard for Sumatran rhinos to procreate and thrive. National Geographic is supporting a conservation effort that may help. ByLauren E. James This story appears in the ...

Sumatran Rhino: Native to Sumatra, Indonesia, this critically endangered rhino is staring at extinction due to habitat loss and poaching. Vaquita: A tiny porpoise found only in Mexico's Gulf of ...