While studying a sample of bridgmanite–a mineral commonly found in Earth’s core and mantle–researchers have deduced that Earth’s inner core is cooling at “rates faster than previously thought.” 

This information is nothing new and nothing of concern; the Earth’s interior has been gradually cooling ever since it came to existence. Researchers predict the planet will inevitably be uninhabitable in “millions or billions of years from now.” 

The bridgmanite studying was found to be 1.5 times more conductive than previously believed, which is how the scientists arrived at their conclusion. 

“Results suggest the mantle is more efficiently cooled,” researchers stated,”(this) would ultimately weaken many tectonic activities driven by the mantle convection more rapidly than expected from conventionally believed thermal conduction behavior.”

Once the planet gets cold, it’ll lose its magnetic field, whose sole purpose is to shield Earth from harmful cosmic radiation. Then, Earth would become an “uninhabitable rock.”

In 2013 Andrew Rushby of the University of East Anglia in the UK inferred that Earth would be viable for life for another “1.75 billion to 3.25 billion years.”