by Carolyn Gramling, ScienceNews
This shift both prevented the protective magnetic field from collapsing and recharged it.
Earth’s inner core solidified sometime after 565 million years ago — just in time to not only save the planet’s protective magnetic field from imminent collapse, but also to kick-start it into its current, powerful phase, a new study suggests.
Continue reading Earth’s core may have hardened just in time to save its magnetic field
by William Weir, PHYS.ORG
Journeying to the center of the Earth, a la Jules Verne, won’t be happening anytime soon. A new material made from a liquid metal and magnetic particles, however, could make it much easier for researchers to recreate the powerful forces at the planet’s core. Continue reading A new material to unearth mysteries of magnetic fields
by Phil Livermore & Jon Mound, Science Alert
When north becomes south
Earth’s magnetic field surrounds our planet like an invisible force field – protecting life from harmful solar radiation by deflecting charged particles away. Far from being constant, this field is continuously changing.
Indeed, our planet’s history includes at least several hundred global magnetic reversals, where north and south magnetic poles swap places. So when’s the next one happening and how will it affect life on Earth? Continue reading Earth’s magnetic poles are set to swap places – and we’re totally unprepared