A magnetic field older than the sun helped shape the planets
Inside a meteorite pulled from Antarctic ice in 2008 sit grains older than Earth itself, calcium-aluminum-rich inclusions that formed within the solar system's first 200,000 years, the oldest known solid material anywhere.
MIT researchers led by Benjamin Weiss measured the magnetic signatures locked inside those grains and found evidence of a field stronger than the one Earth generates today, present while the sun was still a collapsing cloud of gas and dust 3. For a century the story of how that cloud flattened into a disk and birthed the sun and planets has belonged almost entirely to gravity. This finding, published in the Proceedings of the National Academy of Sciences, says magnetism was pulling material inward right alongside it.

