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The remains of a baby woolly rhino that roamed the Earth at least 10,000 years ago have been discovered in a frozen riverbank in Siberia, researchers said.

The rhino calf, nicknamed "Sasha" after the hunter and businessman who found it, is the only complete young specimen of the extinct species ever found, according to scientists at the Yakutian Academy of Sciences in Russia, to whom the creature was donated for study.

The researchers hope to extract DNA from the specimen to determine its placement on the mammal family tree. [See photos of Sasha, the baby woolly rhino]