South Korea’s Sooam Bioengineering Research Institute signed an agreement Tuesday with Russia’s North-Eastern Federal University to clone a mammoth, the giant elephant that went extinct several thousand years ago, Wall Street Journal Asia Korea Realtime reports.

According to the Sooam Institute, bioengineering scientists since 2002 have discovered what they believe to be the remains of a mammoth in the permafrost of Russia. Last August, it was reported that a thigh bone of a mammoth was discovered in Siberia.

Their plan is to replace the nuclei of an elephant cell with one from a mammoth to produce an embryo with mammoth DNA. Then they are going to plant the embryo into the womb of a surrogate elephant.