Have you ever wondered why does Earth have a magnetic field and what causes it? This video explains briefly! SUBSCRIBE ► https://goo.gl/PLLFPz Website ► www.cosmoknowledge.com Facebook ► https://facebook.com/cosmoknowledgee Instagram ► https://www.instagram.com/itscosmoknowledge Credit & Graphics: NASA's Scientific Visualization Studio/JPL NAIF Videoblocks Space Engine Music: I Think I Can Help You - Surviving The Asteroid Belt - Cosmoknowledge brings news from space. We love you, explorers!