While the title is a play on words, real-world mammoths (specifically the woolly mammoth, Mammuthus primigenius ) have been extinct for approximately 4,000 years.
According to leaked documents from the Charles University Institute of Quaternary Paleontology , the mammoths did not die out 4,000 years ago on Wrangel Island. Instead, a breeding herd crossed the frozen land bridge into Central Europe, following the Vltava River. When the climate warmed, they didn't die—they adapted . They moved into the vast network of medieval cellars, abandoned coal mines in Ostrava, and the intricate sewer systems built by Emperor Rudolf II. czech streets 149 mammoths are not extinct yet%21