1 gen 1962 anni - Fredrick Vine and Drummond Matthews made the discovery of magnetic stripes on the ocean floor. The study of Earths older magnetic field. Every 200,000 years Earths magnets reverses. They are in an alignment because of the materials that they contain. The materials contain such things as metal.
Aggiunto al nastro di tempo:
Data:
1 gen 1962 anni
Adesso
~ 62 years ago
