What would happen to life on earth if magnetism didn't exist?

Well, magnetism and electromagnetic force are one and the same. Without it, no light, and no chemistry exists, therefore, no life. read more

Auroras on Earth have been known to shine so brightly, a person could literally read by them. But without Earth’s magnetic field, our entire upper atmosphere would be exposed to the solar wind, completely changing how our auroras might appear – they could even resemble auroras found on Venus and Mars. read more

The average interval of magnetic field reversal is approximately 250,000 years. However, the last magnetic reversal happened approximately 730,000-780,000 years ago. Throughout all of geologic time, there is no evidence that the Electromagnetic Field ever ceased to function, or that the outer core ever stopped rotating. read more