Scientists want to combine woolly mammoth genes with those of an elephant to help elephants cope better with colder temperatures and hopefully help them avoid extinction.
Researchers at Harvard University claimed they had "revived" 44 mammoth genes used to create the hybrid elephant.
"My goal is not to bring the mammoth back, but to bring mammoth genes back and show that they work and that we have already done so," said senior researcher Professor George Church, CNET reports.
But it would not be as easy as implanting an embryo of the hybrid in an adult female elephant.
"We have published a paper that is a general method in which we can transform stem cells into any desired tissue, and in this case, we want decidua, which is the tissue into which implant the embryos, and we're trying to make a vacant version of it, "he said.
But do not expect this to happen tomorrow – scientists believe they will start small Start with a mouse embryo first before moving on to larger mammals.
© Nine Digital Pty Ltd 2018