We all know that earth is pretty big. It would take you 16 days, 16 hours and 45 minutes to drive around earth in a car going 100 kilometres per hour constantly. But what if earth was the size of a football, or soccer ball as some people call it. How tall would the average human be?br br BACKING TRACK: Used under Create Commons Licence.br br To use this video in a commercial player or in broadcasts, please email licensing@storyful.