Moon lacked a magnetic field for nearly all its history – new research resolves mystery sparked by rocks brought back on Apollo

PROMO 64J1 Science - Moon Planet Earth - flickrcc - Wall Boat - public domain

Surrounding Earth is a powerful magnetic field created by swirling liquid iron in the planet's core. Earth's magnetic field may be nearly as old as the Earth itself - and stands in stark contrast to the Moon, which completely lacks a magnetic field today.