In Canada, a mother polar bear did something special. She is five years old. She took in a baby cub that was not hers. This is very rare. It happened near a town called Churchill.
The mother bear, named X33991, had one cub. Then she had another. Scientists think she found a third cub. This cub was alone. It lost its own mother. Female polar bears are good mothers. They like to help baby bears.
This kind of help is not seen often. It has only happened twelve times in fifty years. Scientists are watching the mother bear. They put a special collar on her. They want to know more. They are collecting samples.
It is hard for polar bear cubs. Many do not live long. A mother's help is important. She teaches them to hunt. She helps them travel. Climate change also makes life hard. Any cub that lives helps polar bears. This helps them have a future.