Japanese scientists produce clones of mice dead and frozen for 16 years . This is how researchers created Dolly the Sheep , the first mammal to be cloned from an adult animal . Score: 6 Researchers used cells from mice that were frozen for 16 years at -20 Celsius .
Japanese scientists produce clones of mice dead and frozen for 16 years . Score: 6 Researchers used cells from mice that were frozen for 16 years at -20 Celsius .