It took 250 years for the Laschamps reversal to take place and it stayed in the unusual orientation for about 440 years. At most, Earth's magnetic field may have remained at 25 percent of its current ...

Every few hundred thousand years, Earth’s magnetic poles flip, turning north into south and south into north. These ...

Funding for eight new wetland projects in five northwest Ohio counties now brings the grand total to 203 statewide.