We only need a compass to know we're surrounded by a force that lines up with the globe's axis. The magnetic field, which makes our planet flushing with life, or the solar particles could strip away the atmosphere, just like what Mars has experienced. Some may think the field always steadfastly point to the north and south poles. But in fact, it is not. Subscribe to us on YouTube: https://goo.gl/lP12gA Download our APP on Apple Store (iOS): https://itunes.apple.com/us/app/cctvnews-app/id922456579?l=zh&ls=1&mt=8 Download our APP on Google Play (Android): https://play.google.com/store/apps/details?id=com.imib.cctv Follow us on: Website: https://www.cgtn.com/ Facebook: https://www.facebook.com/ChinaGlobalTVNetwork/ Instagram: https://www.instagram.com/cgtn/?hl=zh-cn Twitter: https://twitter.com/CGTNOfficial Pinterest: https://www.pinterest.com/CGTNOfficial/ Tumblr: http://cctvnews.tumblr.com/ Weibo: http://weibo.com/cctvnewsbeijing Douyin: http://v.douyin.com/aBbmNQ/