magnetic fields Archives - State of the Planet

In Ancient Rocks, Scientists See a Climate Cycle Working Across Deep Time

A gradual shift in Earth’s orbit that repeats every 405,000 years plays a role in natural climate swings.

by |May 7, 2018

When North Itself Wanders

I love thinking about why my compass points north.
The deep, molten-metal motions, rising
And falling … gargantuan currents of iron
Conceiving vast magnetic fields, revealed
In my hand, by a tiny, quivering red needle.

by |July 25, 2014

Solar Heartbeat

Upon our little spinning rock,
Cosmic rays and debris knock.
Through great fields and waves we race,
Not empty, our broad path through space!

by |February 28, 2014