There May Be an Ancient Earth Inside Earth, Say Harvard Scientists

There May Be an Ancient Earth Inside Earth, Say Harvard Scientists

A team of Harvard scientists believe the remnants of an ancient Earth, dating to the time another planet collided with ours to produce the moon, may still be lodged deep within the Earth’s mantle.

If you thought it was a trip to see the Earth from space, then wait until you get a load of this: A team of scientists from Harvard University believe that have found evidence that an ancient Earth exists inside the Earth.

The team believes that a previously unexplained isotopic ratio from deep within the Earth might be a signal from material from before the Earth collided with another planet-sized body, which led to the creation of the Moon. This might be an echo of an ancient Earth that existed 4.5 billion years ago, prior to the proposed collision.

The current favored theory says that the Moon was formed 4.5 billion years ago when the Earth collided with a mass the size of Mars, dubbed “Theia.” This theory states that the heat generated by the collision would have melted the whole planet before some of the debris spun off to create the Moon.

But now, the team at Harvard, led by Associate Professor Sujoy Mukhopadhyay, believe that they’ve found evidence to support that only part of the Earth melted, and that an ancient part still exists within the Earth’s mantle.

According to Professor Mukhopadhyay: “The energy released by the impact between the Earth and Theia would have been huge, certainly enough to melt the whole planet. But we believe that the impact energy was not evenly distributed throughout the ancient Earth. This means that a major part of the impacted hemisphere would probably have been completely vaporized, but the opposite hemisphere would have been partly shielded, and would not have undergone complete melting.”

The team analyzed the ratios of noble gas isotopes from deep within the Earth’s mantle and compared the results to isotope ratios closer to the surface. They found that 3He to 22Ne ratio from the shallow mantle is significantly higher than the equivalent ratio deep within the mantle.

Professor Mukhopadhyay remarked: “This implies that the last giant impact did not completely mix the mantle and there was not a whole mantle magma ocean.”

Further evidence comes from analysis of the 129-Xenon to 120-Xenon ratio. Material brought to the surface from the deep mantle has a lower ratio than what’s normally found near the surface. Because 129-Xenon is produced by the radioactive decay of 129-Iodine, the isotopes place the formation age of the ancient section of mantle to within the first 100 million years of Earth’s history.

“The geochemistry indicates that there are differences between the noble gas isotope ratios in different parts of the Earth, and these need to be explained. The idea that a very disruptive collision of the Earth with another planet-sized body, the biggest event in Earth’s geological history, did not completely melt and homogenize the Earth challenges some of our notions on planet formation and the energetics of giant impacts. If the theory is proven correct, then we may be seeing echoes of the ancient Earth, from a time before the collision,” said Professor Mukhopadhyay.

Professor Richard Carlson of the Carnegie Institution Department of Terrestrial Magnetism stated: “This exciting result is adding to the observational evidence that important aspects of Earth’s composition were established during the violent birth of the planet and is providing a new look at the physical processes by which this can occur.”

The findings of the team at Harvard coincide with a German team’s findings supporting the theory that the Moon was formed 4.5 billion years ago after a catastrophic collision with a planet-sized mass.

Both the Harvard and German teams presented their findings to the Goldschmidt Geochemistry Conference in California this week.


Source ultraculture.org


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  1. Yes, it could be true. When I was a kid, I remember, my grandma told me that the moon was so much nearer that you can touch it during the ages of her great great great grandparents. Give and take about the story or whatever it is, it could be have happen. When I started reading about, that the moon was created by a collision by another big object, through youtube and scientific reports . I started to recollect about what my grandma told. May God bless us all.

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  3. Conspiracy Theories, that the Earth is flat and hollow…. let us combine that theory, if and only if the earth is hollow and flat,I there for conclude that living existence are on the top and the other are inside or underneath this earth. One of the conspiracy theory is the “Gero’s” civilisation on inner Earth…. https://youtu.be/GDaiw-G1VGE

    • Looking at our solar-system .. simply: ‘Objects from outerspace’ coming in at any given moment in Times Unknown, will first be confronted by the outer-planets like Neptune, Uranus, Saturn + Jupiter. Bodies with relatively high gravitation. Also these bodies have a certain number of moons that easily will have been bigger in number than known at this moment. And why-not? .. one of these moons, now ‘ours’ possibly came from any of the known older planets. So .. consequently the number of outer-planets could have been bigger in number in Times Unknown .. Use common sense first please.

  4. Actually the continents are the remnants of this pre-earth. The oldest landforms are on the continents 4,000,000,000 years old, while
    the ocean floors are nowhere older than 80,000,000 years old.
    A difference of 3,920,000,000 years. 50 times older…

    • Actually a smaller earth is also an explanation for the mega fauna that exsisted before 80 mya, a smaller planet has a smaller gravity and thus animals can grow bigger. A T-rex on present earth would probably not be able to stand on his legs.. wich are more like birdleggs, An eliphant is now the largest landanimal and has very special leggs to be able to carry that weight, A brontosaurus had similar leggs, but much bigger.

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