'Earth's liquid iron core is instrumental in creating this field that protects the Earth from cosmic rays'
geomagnetic field (electromagnetic field accepted)
THIRD ROCK FROM THE SUN: Earths liquid iron core is instrumental in creating this field that protects the Earth from cosmic rays
Earth's liquid iron core is instrumental in creating this field that protects the Earth from cosmic rays
Earth's liquid iron core is instrumental in creating this field that protects the Earth from cosmic rays
THIRD ROCK FROM THE SUN
geomagnetic field electromagnetic field accepted
THIRD ROCK FROM THE SUN