Season 1Episode 521m
Magnetic Shield
2013-06-270.0 rating
A metallic core at the center of the Earth turns the planet into a magnet, generating a field that protects life on the surface from cosmic radiation.
2013-06-270.0 rating
A metallic core at the center of the Earth turns the planet into a magnet, generating a field that protects life on the surface from cosmic radiation.