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Imagine, dear friend, that a long and constant winter has come to our planet, with ice all around, severe frosts and cold winds…These winters are not at all comparable to the periods of great cold that left their mark on the history of our planet. These periods were called glacial, and there were several of them in the history of the Earth. But the most important thing is that such periods lasted not for a few months, but for thousands and thousands of years.

But despite the fact that most of the continents were covered with ice at that time, and the air temperature was critically low, life existed on our planet even then. Animals of that time, for example, managed to adapt to the cold with the help of thick fur. Many of them had large tusks and long fangs. Even in cold conditions, vast forests stretched from west to east on many of today's continents. In those days, primitive people - Neanderthals - were able to exist as well. The pirate cats, who love to travel through time and seek to change history in their favour at any cost, this time accidentally got into the ice age, but decided to take advantage of it. But will they succeed in realising their next evil plan? After all, Geronimo Stilton's team of history rescuers is on the way to thwart the pirate cats' plans and leave history unchanged.