Everyone (hopefully) knows the world is not flat. In fact, it's a sphere with mountain peaks as high as 29,000 feet and dips as low as 35,000 feet. But did you know that entire towns and cities can rise and sink from the ground? If any reader believes that's a myth, go visit London's Kennington neighborhood, an area that's sunk roughly one centimeter in the past year.

The news came after a European weather satellite called Sentinel-1 beamed back information showing that the topography of the district, which is located in South London, had moved lower into the ground. Launched in 2014, the Sentinel-1 has been obtaining information of the tiniest movements to the earths surface throughout Europe. The satellite focused on outlining the U.K. between 2015 and 2017, and through a mission conducted by the European Space Agency, the Sentinel-1 determined that Kennington has in fact sunk into the ground. A U.K.-based geographic surveying firm called Geomatic Ventures gathered the information and came to an interesting conclusion as to why they believe the ground in Kennington had sunk: the tunneling of a new London Underground line.

The Sentinel-1 satellite was able to detect that the south London neighborhood of Kennington has sunk about 1 cm in the past year.

An extension of the Northern line was finished in November 2017, which meant that in the months leading up to that point, all of the tunneling most likely caused the ground to sink, and led to the Sentinel-1 detecting this slight abnormality in its survey of the land. And while some might (rightfully) believe this to be a massive issue, Kennington's infrastructure should be able to withstand the slightly lower elevation, so long as the entire area collectively sinks in unison. Issues will most likely begin to occur if and when some things sink, and others do not. In the meantime, however, commuters using the Northern line should know that they are basically moving heaven and earth to get to and from work each day.