As a consequence of unusually low temperatures in the atmosphere above the north pole a rare 'mini-hole' has opened in the ozone layer over the Arctic. According to scientists from the German Aereospace Center (DLR), the hole is being tracked from space and the ground over the past few days and has reached record dimensions. But it does not pose any danger to humans yet until it reaches further south. As per current trends, the hole is expected to disappear within the next few weeks. The hole could be a result of ozone-destroying chemicals such as chlorine and bromine in the atmosphere, said scientists.