Researchers say Earth's core may be cooling 'more rapidly than expected'
Earth has been cooling for 4.5 billion years, although the pace of cooling is still being studied.
When the planet gets cold enough, it will begin losing its magnetic field, which protects the Earth from damaging cosmic radiation.
The study did not offer an estimate of how long life may be sustained on Earth.
In 2013, Andrew Rushby of the University of East Anglia predicted that Earth might be livable for another 1.75 billion to 3.25 billion years.
as long as the planet does not experience a nuclear holocaust, rogue asteroid or a different unexpected catastrophe.
Researchers are warning that the Earth‘s core may be cooling “more rapidly than expected,” which could speed up the timeline for when the planet becomes uninhabitable for humans.