When Our Magnetic Field Flips. By Rick Groleau; Posted 11.18.03; NOVA; Every so often—every 250,000 years on average—the Earth's magnetic poles reverse polarity.

In the Earth (see image below right), the liquid metal that makes up the outer core passes through a magnetic field, which causes an electric current to flow within the liquid metal.

It flows just like the liquid metal that surrounds our planet's solid inner core, ... Since its ability to generate magnetic fields is five times stronger than pure liquid metals', ...

“We find that both exhibit strong linearly increasing trends, coupled with a large surge in magnitude between 330 and 220 ...

Although the magnetic field of Mars hasn't been in effect for billions of years, the evidence it left behind may suggest that the planet's core is entirely liquid. Magnetic imprints still exist on ...

The Earth's magnetic field is a result of the movement or convection of liquid iron in the outer core. As the liquid metal in the outer core moves, it generates electric currents, which lead to a ...

Yale researchers create liquid metal that mimics Earth's magnetic core ... It generates magnetic fields up to five times stronger than pure ... Boris reacts to local election results in his Daily ...

One of the most enduring mysteries stemming from the Apollo moon missions is why rocks brought back to Earth for analysis are magnetized. There's no magnetic field on the moon today and scientists ...

Boffins, who clearly don’t think seeing science fiction movies is cool, have designed a shape-shifting liquid metal that can transition between the solid and liquid state. The new liquid is ...

Since magnetic particles are sprinkled throughout the gallium, a permanent magnet can drag it around. In solid form, a magnet can move the material at a speed of about 1.5 meters per second.

Our magnetic field is generated and maintained by a convective flow of molten metal that forms the Earth's outer core. Motion of the liquid iron creates the electric currents that power the ...

The history of magnetism on Mars remains a critical field of study since it is closely tied to the planet’s potential capacity for life billions of years ago. Mars’ magnetic field was once generated ...