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The desert pupfish has evolved to go without oxygen for considerable periods of time to survive its harsh environment

And you thought you could hold your breath for a long time. Enter the desert pupfish, a tiny fish that has been playing evolutionary catch-up due to the extreme changes in its environment over the last 10,000 years.

The relict leopard frog’s journey into Southern Nevada’s landscape has seen its share of challenges.

A shrewlike creature in Madagascar that can hibernate for at least nine months of the year without waking may help reveal how mammals survived the cataclysm that ended the age of dinosaurs, researchers suggest.