Scientists discover core deep inside Earth — a solid ball of iron and nickel

Researchers on Tuesday said an intensive study of Earth’s deep interior confirmed the existence of a distinct structure inside our planet’s inner core.
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Something very weird is happening inside Earth's core

Science This Week Innermost layer of Earth's core detected - The Hindu

Scientists Discover Deepest Region Of The Earth – A Solid Ball Of Iron And Nickel - News18

450-mile-wide solid metal ball forms Earth's innermost core, earthquake waves reveal

Iron in the Earth's core weakens before melting

How We Know What's Deep Inside the Earth, Despite Never Traveling There

Earth's Inner Core is Around 1.15 Billion Years Old, Study Shows

Scientists unlock secrets of Earth's wickedly hot innermost realm

Earth's Innermost Layer, UPSC Current Affairs

Research journey to the center of the Earth