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Discovery Reveals Hard Metallic Truth at Earth’s Centre

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Discovery Reveals Hard Metallic Truth at Earth’s Centre
A file photo of Earth from space NASA
AAP
By AAP
2/21/2023Updated: 2/21/2023
0:00

Australian scientists have made a ground-breaking discovery deep below the Earth’s surface.

Their research confirms a 20-year-old hypothesis by revealing the planet, much like a Kinder Surprise, has a hard, inedible mass at its centre.

Beneath the planet’s well-known crunchy crust, molten mantle, and creamy outer and inner core, scientists found a surprise fifth layer comprised of a solid metallic ball.

Australian National University researcher Prof. Hrvoje Tkalčić says the discovery reveals a lot about the planet’s evolution.

“It’s a fossilised record that serves as a gateway into the events of our planet’s past,” he said.

Researchers made the discovery by analysing seismic waves journeying to the centre of the Earth, according to their findings released on Wednesday.

In one instance, an earthquake from Alaska triggered seismic waves in the south Atlantic before bouncing back to its origin.

Using this information, scientists examined the speed and trajectory of the waves and found evidence of a hard metal mass made from an iron-nickel alloy.

The new research, published in Nature Communications, suggests a major global event occurred during the Earth’s evolution that caused a significant change in the texture of the planet’s core.

But Prof. Tkalčić says there is much more to learn.

“There are still many unanswered questions about the Earth’s innermost inner core, which could hold the secrets to piecing together the mystery of our planet’s formation.”

AAP
AAP
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Australian Associated Press is an Australian news agency.
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