Scientists Create Mice With Woolly Mammoth-Like Fur

RESEARCHERS AT A COMPANY IN TEXAS ARE WORKING TO CREATE A LIVING ANIMAL THAT RESEMBLES THE EXTINCT WOOLLY MAMMOTH. Recently, they produced mice with traits of the large mammal. The mice all have coats with mammoth-like fur, and some of the small mammals also have genes that help them store fat. Both features would help the animals survive in the cold Arctic, where the woolly mammoth once lived.

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The scientists studied the genomes, or sets of DNA instruc- tions, of the mice to pinpoint the genes that need to be edited to produce the desired traits. They tried different combinations of edits for fur in the mouse genomes. Some mice were born with frizzy fur and others with fluffy fur. The coats were noticeably mo