Earth’s magnetic field older than thought
MAR 10, 2010
DOI: 10.1063/PT.5.024145
Science News : Evidence for the existence of Earth’s magnetic field has been pushed back about 250 million years, new research suggests. The field may therefore be old enough to have shielded some of the planet’s earliest life from the Sun’s most harmful cosmic radiation.
© 2010 American Institute of Physics
