What animal has the longest gestation period? From salamanders to elephants, here’s how long it can take to make a baby.

The mice were created by Colossal Biosciences, which edits DNA for species conservation, and has been working to bring back the woolly mammoth since 2021.

“Our aim is to produce a hybrid elephant-mammoth embryo,” Church told the Guardian. “Actually, it would be more like an elephant with a number of mammoth traits. We’re not there yet, but it could ...

was genetically engineered to have characteristics that could eventually be used in creating a next-generation woolly mammoth embryo to be born by a female elephant. The goal of Colossal's biotech ...