Prof George Church and his team at Harvard University have been studying the DNA from frozen mammoths found preserved in the Arctic. Specifically, they’ve been looking for genes that separated them from elephants.
Since elephant species are currently on the brink of extinction, the team is attempting to splice mammoth DNA into the genome of an elephant embryo in order to create a mammoth-elephant hybrid. The goal is to eventually grow a mammoth embryo within an artificial womb, as to not compromise the reproductive system of a healthy elephant.
https://futurism.com/4-we-could-see-woolly-mammoths-resurrected-within-two-years/