7 numbers Olivia Zhu - 02 Feb 2021 The world marathon record, created by Eliud Kipchoge, is 01:59:40 while the average completion time for a full marathon is 04:43:42.Until 01/28/21, 35.82% of people have gained weight during quarantine.North Dakota is the least forest-covered state in the US with only 1.52% of its land covered by forests.Across the 5 boroughs of NYC, Manhattan is the densest-populated borough with 27,544 people/km^; on the other hand, Staten Island is the least-populated borough with 3,150 people/km^.The average height difference between male and female in an American heterosexual couple is 6 inches.25% of all known animals are beetles.Almost 70% of readers will not abandon print books.