Earth's Magnetic Shield Is Much Older Than Thought

Science Daily ^ | 07/30/2015 | J. A. Tarduno, R. D. Cottrell, W. J. Davis, F. Nimmo, R. K. Bono.

[JimSEA]

Since 2010, the best estimate of the age of Earth's magnetic field has been 3.45 billion years. But now a researcher responsible for that finding has new data showing the magnetic field is far older.

John Tarduno, a geophysicist at the University of Rochester and a leading expert on Earth's magnetic field, and his team of researchers say they believe the Earth's magnetic field is at least four billion years old.

[Seruzawa]

I don’t think it would be possible for the core to “start spinning”. It would have been spinning as the earth formed through gravitational collapse.

[sand88]

My favorite statistic is that the Earth weighs 13,170,000,000,000,000,000,000,000 lbs, yet a 100 lb liberal thinks he can save it. Can we say ‘God complex?’ It remains to be seen whether God is laughing or frowning.

The first day of Physics class in college the professor asked the class what is the weight of the Earth?

The answer is zero. It's better to ask what is the Mass of the Earth.

Thanks for making me think back...