For more than 40 years experts were baffled by an "anti-gravity zone" surrounding the Hudson Bay are in Canada, with some conspiracy theorists even claiming the spot might be a portal into another dimension. Scientists conducting a global gravity field survey first noticed the strange anomaly in the 1960s but have been unable to explain why gravity is so much weaker in the Canadian region – until now. It has been revealed that the Laurentide Ice Sheet, which covered much of present-day Canada and the northern United States, was so large that it dented the earth 10,000 years ago, literally bending gravity. Hudson Bay, Canada, has been found to have less gravity than anywhere else in the world The earth is taking a long time to bounce back, currently it flattens by around half and inch a year, which is minuscule when compared to the amount of pressure it came under from the monumental ice sheet, which was 2.3 miles thick. Scientists believe it will be 5,000 years before it has recovered