# Why north & south pole are very cold? [closed]

I know in these regions sunlight barely falls & sometimes it won't fall at all.

If sunlight doesn't fall for a very long time it doesn't mean that the whole region should become very cold.

For example: a hot cup after some time becomes cold because of heat exchange with the surroundings.

Earth having normal temperature, even heat exchange happens surface would be cold not very cold with glaciers,mountains etc.

What is cooling the north & south poles?

This is the wrong question, it should read who or what is heating up the rest. If there were no sources of heat in the Universe, the temperature would be minus 273°C or Absolute $0$! Anywhere that is not getting infra red radiation would tend to this temperature i.e. planets that only show one side to the Sun.