Discovery of Earth's Ancient Magnetic Field in Greenland Rocks Reveals New Insights

Scientists uncover 3.7-billion-year-old magnetic field signals in Greenland, challenging previous understanding of Earth's early geophysical conditions.

New research in Greenland has identified the earliest known evidence of Earth's magnetic field, dating back 3.7 billion years.
The findings suggest that Earth's magnetic field was established much earlier than previously thought, providing crucial protection against solar radiation.
This discovery was made possible by analyzing magnetite in ancient rocks, which preserved the magnetic signals.
The intensity of the magnetic field at that time was measured at 15 microteslas, comparable to today's average field strength.
The existence of an early magnetic field could have significantly influenced the development and evolution of life on Earth.