ScienceOur viewer's questionTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoScienceCharlotte Wilczok08/01/2011August 1, 2011Our viewer´s question: Why is the earth round? # 01.08.2011 # Tomorrow Todayhttps://p.dw.com/p/RdJSAdvertisement