Woolly mouse

Not to be confused with Long-haired rat.
Woolly mouse
OrganismMus musculus
ModeGenome editing
DeveloperColossal Biosciences
Trait(s) conferred
  • Woolly coat
  • Elongated hair
  • Golden-brown fur
  • Cold tolerance
  • Curly whiskers
  • altered metabolism

The woolly mouse refers to a variety of genetically modified laboratory mice created in 2024 by Colossal Biosciences as part of a proof-of-concept in de-extinction of the woolly mammoth through genetically modifying its closest living relative. The mice feature mammoth-inspired traits which include dense woolly coats, altered metabolism and other genetic modifications aimed at cold tolerance.

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