The head of an Ice Age wolf, at the Mammoth Fauna Study Department at the Academy of Sciences of Yakutia, Russia, June 10, 2019. Experts believe the wolf roamed the earth about 40,000 years ago, but thanks to Siberia's frozen permafrost its brain, fur, tissues and even its tongue have been perfectly preserved, as scientific investigations are underway after it was found in August 2018. (Valery Plotnikov/Mammoth Fauna Study Department at the Academy of Sciences of Yakutia via AP)