Colossal Biosciences

Colossal Biosciences Inc. is an American biotechnology and genetic engineering company working to de-extinct several extinct animals, including the woolly mammoth, the Tasmanian tiger, the northern white rhinoceros, the dire wolf, and the dodo. In 2023, it stated that it wants to have woolly mammoth hybrid calves by 2028, and wants to reintroduce them to the Arctic tundra habitat. Likewise, it launched the Tasmanian Thylacine Advisory Committee, a thylacine research project to release Tasmanian tiger joeys back to their original Tasmanian and broader Australian habitat after a period of observation in captivity.

The company develops genetic engineering and reproductive technology for conservation biology. It was founded in 2021 by Harvard geneticist George Church and billionaire entrepreneur Ben Lamm. It is based in Dallas, Texas.