Animal Behaviour Zone
Medical Physics Zone
Space Exploration Zone
Asked by kingsavag to Reka on 21 Nov 2016.
Because gravity pulls Earth in towards itself – and the shape when all of Earth’s points are equally distant from its centre is a sphere!
View all answered questions
Copyright Gallomanor, produced by Mangorolla CIC 2017
Short link to this page http://ias.im/258.4552