The North American company Colossal Biosciences, which aims to bring back extinct species, has announced that it has created an artificial incubation platform that allows for the complete development of bird embryos outside a biological shell. According to a company press release — and not a scientific publication — the technology has already been successfully validated with chicken embryos, which reportedly completed the incubation process to hatching without using supplemental oxygen. This privately funded biotechnology company claims that this advance could open the door to the "de-extinction of birds that have gone extinct, such as the giant moa of New Zealand's South Island; a species extinct in the 15th century that could exceed three and a half meters in height and weigh up to 250 kilos.