Scientists revive cells from 40-year deep freeze to clone endangered horse

Researchers from San Diego Zoo Global have cloned a Przewalski’s horse from skin cells taken from a stallion in 1980. The cells had been safeguarded at the Frozen Zoo. 2-month-old Kurt belongs to a species native to central Asia that went extinct in the wild and is still critically endangered. Kurt will soon join San Diego Zoo’s 14 Przewalski’s horses as part of a conservation & breeding program.