RT @ExploreCosmos_: A new study suggests that Earth's magnetic field formed before the planet's core, providing protection from cosmic radi…
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RT @ExploreCosmos_: A new study suggests that Earth's magnetic field formed before the planet's core, providing protection from cosmic radi…
83 followers
RT @ExploreCosmos_: A new study suggests that Earth's magnetic field formed before the planet's core, providing protection from cosmic radi…
576 followers
RT @ExploreCosmos_: A new study suggests that Earth's magnetic field formed before the planet's core, providing protection from cosmic radi…