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Earth's magnetic field formed before the planet's core, study suggests
By Stephanie Pappas
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Oldest Trace of Earth's Magnetic Field Discovered in 'Beautiful, Weird' Rocks » Explorersweb
By Sam Anderson
Earth’s protective sky is at least 3.7 billion years old
By Miguel Angel Criado
Earth Had a Magnetosphere 3.7 Billion Years Ago
By Carolyn Collins Petersen
Scientists uncover 3.7-billion-year-old record of Earth's magnetic field
By Mrigakshi Dixit
Oldest evidence of Earth's magnetic field in Greenland rocks
By Shireen Gonzaga
Look! 3.7 Billion-Year-Old Rocks Reveal The Oldest Evidence of Earth's Magnetic Field
By Doris Elin Urrutia
3.7 Billion Years Ago, the Earth's Magnetic Field Played A Vital Role in the Evolution of Life
By Mj Banias
Oldest undisputed evidence of Earth's magnetic field
By Imma Perfetto
Earth's Magnetic Field Is Almost Similar to What it Was Like 3.7 Billion Years Ago
By Elizabeth Gamillo
