You've heard of the woolly mammoth. But have you heard of woolly
mice? These critters were genetically modified by the Dallas-based biotech company
Colossal Biosciences to have the same "woolly" and fat appearance as the ancient mammoths. The mice are a key step in the longer journey to de-extinct the woolly mammoth. NPR's
Rob Stein takes us to the lab where it all happened.
Interested in more biotech stories? Let us know by dropping a line to shortwave@npr.org.
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