In this instance it was thousands of years though:
> "Not only did polar bear survive these two extended periods when ice-free summers prevailed, but the Eemian warm summers came only about 10,000 years after the bears arose as a unique species. This makes polar bear survival through the Eemian even more impressive than most scientists acknowledge."
> "Not only did polar bear survive these two extended periods when ice-free summers prevailed, but the Eemian warm summers came only about 10,000 years after the bears arose as a unique species. This makes polar bear survival through the Eemian even more impressive than most scientists acknowledge."