Colossal Biosciences is a biotechnology company focused on de-extinction, using advanced genetic engineering to bring back extinct species and restore lost ecosystems. Founded by entrepreneur Ben Lamm and geneticist George Church, the company aims to revive species such as the woolly mammoth, dodo, and Tasmanian tiger through gene editing techniques like CRISPR.

Beyond de-extinction, Colossal develops genetic tools for conservation, including efforts to protect endangered species. The company is also exploring artificial wombs and embryo development to facilitate the birth of genetically modified animals. While its ambitions have sparked both excitement and controversy, Colossal argues that its work could combat climate change and enhance biodiversity.