The bluebuck became extinct just 34 years after it was first scientifically documented. [Image: Colossal]
Cloned by Viagen in 2023 from cells frozen for more than 40 years, “Ollie,” a Przewalski’s horse foal shown here at five days old, marks another milestone in using biotechnology to help restore threatened animal populations. [Photo: Elizabeth Arellano Photography/Viagen]
The South Island giant moa towered over New Zealand's forests for millions of years before becoming extinct within a century of Polynesian settlement around 1400 CE. Colossal Biosciences plans to resurrect the 500-pound birds using ancient DNA extracted from cave deposits and artificial egg technology. [Source image: Colossal Biosciences]