Oldest Evidence of Earth s Magnetic Field Found: Oxford Study miragenews.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from miragenews.com Daily Mail and Mail on Sunday newspapers.
Researchers have recovered a 3.7-billion-year-old record of Earth’s magnetic field from Greenland, providing the oldest estimate of its strength derived from whole rock samples.