Concern has been mounting for almost a decade as scientists hunched over their instruments and double-checked new data concerning the status of the Earth's crucial magnetic field.
The magnetic field protects all life from damaging solar radiation. Exposure to such radiation can cause cancer and mutate DNA. Some researchers believe evolution has been driven in part by epochs marked by a failing or weak magnetic field that allowed the surface of the world to be bathed with intense ultra-violet and other deadly forms of life-changing radiation.
Now new evidence has emerged leading some scientists to believe that the magnetic pole shift—an ongoing phenomenon that has been happening for decades—has reached a tipping point.
According to a report issued by the prestigious British Geological Survey (BGS), evidence suggests the magnetic reversal has begun.
The BGS has taken this position based on careful analysis of a region of the Earth known as the South Atlantic Anomaly (SAA). It's an area where the magnetic field is in a state of flux and has weakened noticeably. The data shows the anomaly is growing rapidly and spreading west from South Africa.
All of this indicates the Earth's liquid core is changing.
"This may be early evidence of a forthcoming reversal in the direction of the Earth’s internal magnetic field," states the article on the BGS website.