Researchers find oldest undisputed evidence of Earth's magnetic field

Researchers find oldest undisputed evidence of Earth's magnetic field A new study, led by the University of Oxford and MIT, has recovered a 3.7-billion-year-old record of Earth's magnetic field, and found that it appears remarkably similar to the field surrounding Earth today. The findings have been published in the Journal of Geophysical Research. Without its magnetic field, life on Earth would not be possible since this shields us from harmful cosmic radiation and charged particles emitted by the sun (the …