Colossal, a biotech firm with focus on resurrecting lost creatures says it has hatched live chicks in an artificial environment.
Though the revelation has been greeted with mixed reactions from scientists and critics of its de-extinction mission, the company insists that 26 baby chickens, ranging from a few days to several months old, were born from a 3D printed lattice structure that mimics an eggshell, according to Colossal Biosciences.
Colossal previously announced it had genetically engineered living animals to resemble extinct species, including mice with long hair like the woolly mammoth and wolf pups that take after dire wolves.
Colossal’s chief executive, Ben Lamm said the artificial egg technology could one day be scaled up to genetically tweak living birds to resemble New Zealand’s extinct South Island giant moa, whose eggs are 80 times the size of a chicken’s and would be difficult for any modern bird to lay.
“We wanted to build something that nature has done a pretty good job of developing and make it better and scalable and even more efficient,” Lamm said.
Independent scientists say the technology, while impressive, lacks some components to be truly considered an artificial egg.
And they said the idea of reviving extinct beasts is likely impossible. “They might be able to use this technology to help them make a genetically modified bird, but that’s just a genetically modified bird. It’s not a moa,” said evolutionary biologist, Vincent Lynch with the University at Buffalo.
To hatch the chicks, Colossal scientists poured fertilized eggs into the artificial system and placed them in an incubator.
They also added calcium, which is normally absorbed from the eggshell, and imaged the embryos’ development and growth in real-time. Scientists say Colossal has designed an artificial eggshell with a membrane that allows the right amount of oxygen to get in, just like a real egg.
But other components of an egg — like temporary organs that form to nourish and stabilise the growing chick and remove waste — weren’t included. “That’s not an artificial egg because you’ve poured in all the other parts that make it an egg. It’s an artificial eggshell,” said Lynch.
In decades past, researchers have used cruder technology to create transparent eggshells that hatched chicks from plastic films or sacks. Such technologies are useful to study chicken development and glean insights that can also be applied to other mammals and even humans.
