That's why it's so hard to find reliable records of the early magnetic field, even if the rock itself is confirmed to be very old. A team led by geologist Claire Nichols of the University of ...

In the March 4, 2025, online issue of the journal Geology, Utah State University geoscientists Jordan Jensen and Alexis Ault ...

Now, researchers from the University of Oxford and the Massachusetts ... aligning with Earth's magnetic field when the rock around them first crystallized 3.7 billion years ago.

and nuclear magnetic resonance (NMR's). The health effects of these magnets aren't fully understood. The main hazard is to those with pacemakers or metal implants in their body. The University of ...