Norwegian scientists have conducted studies and found that grey rats do not forget their own relatives, who treated him with kindness. They tried to bring more benefits to those most rodents, which previously helped them.

It is likely that such a step animals go in order to enlist the support of each other later. In addition, they are characterized by altruism. The most striking thing that they can feel sorry for wrong decisions. With all this gratitude to model some time later, the animals virtually unknown.

According to a statement by one of the creators of the experience of the ecologist Michael Thabor , previously scientists thought that gratitude is peculiar to man. He added that the study was conducted with the participation of females Norwegian rats. Rodents of this type prefer to receive in food bananas, and carrots are not welcome, Biology letters.

The study was held with the participation of females Norwegian rats. Rodents of this type of adore to get into food bananas, and carrots they don't really like. Rats were divided into pairs. 1 of them could stretch a piece of food on a stick. Host rodents were admitted your companion or good ( if they were given a banana), or bad (if fed carrots).

After this, rats are reversed: now those who had been received from the neighbor banana or carrot, could in response to feed him cereal. Rats that were given to companions bananas, received the flakes bigger and faster comparing with those that shared and shared only carrots.

After this, rats are reversed: now those who had been received from the neighbor banana or carrot, could in response to feed him cereal. Rats that were given to companions bananas, received flakes more and more in comparison with those that shared and shared only carrots.
sections: Society, World News