Because the one thing we really need more of is giant, furry, aggressive elephants running about

''Mammuthus columbi'' in the George C. Page Museum at the La Brea Tar Pits, Los Angeles, Author=WolfmanSF 

A group of researchers are getting closer to bringing the extinct woolly mammoth back to life. Geneticist George Church’s lab at Harvard University successfully copied genes from frozen woolly mammoths and pasted them into the genome of an Asian elephant.

Using a DNA editing tool called CRISPR, the scientists spliced genes for the mammoths’ small ears, subcutaneous fat, and hair length and color into the DNA of elephant skin cells. The tissue cultures represent the first time woolly mammoth genes have been functional since the species went extinct around 4,000 years ago...