Do you remember the 1969 French film titled Hibernatus? The title character-Paul Fournier (played by Bernard Alane)-is awakened after more than 50 years of being frozen in the Greenland ice, and his appearance causes many amusing adventures, but also unexpected problems. It only took half a century of hibernation, and already a newcomer from the past has caused quite a stir. The situation is no different with other frozen animals trapped in the ice of Alaska or Siberia. The permafrost stores not only mammoths, but also many secrets that, when released after tens, hundreds, and sometimes even millions of years, can stir up as much trouble as the titular Hibernatus.