<h5>Parts of which ancient planet might be buried inside Earth?</h5><p>A study says that billions of years ago, a Mars-sized asteroid slammed into the newly formed Earth that helped build the moon. The impact caused then may have left continent-sized remains of the asteroid near the Earth's core.</p><p>Scientists believe Earth was created around 4.5 billion years ago. Study also says that the Moon was formed shortly after that. The most popular explanation for the moon's formation is that the collision of two protoplanets created it. One was the developing Earth, and the other was a Mars-sized rock named Theia.</p><p>A new study says the impact buried bits of Theia under Earth's mantle.</p><h5>Who conducted the study?</h5><p>Geophysicist Qian Yuan and colleagues have conducted the study. It was published in the journal Nature. It found that some of Theia’s material may form two massive, dense portions of Earth's mantle today.</p><figure class="image"><img src="https://firebasestorage.googleapis.com/v0/b/newsahoot.appspot.com/o/parts-of-an-ancient-planet-might-be-buried-inside-earth%2F640px-The_layers_of_the_Earth_model.jpg?alt=media&amp;token=9e1630fa-ee5a-4d5e-9abb-b851c0c4e9a2&amp;_gl=1*zf0vai*_ga*MTIzNjQ0ODg2NS4xNjgzNzk5MjMy*_ga_CW55HF8NVT*MTY5ODk5NDY5Mi4yOTEuMS4xNjk4OTk1NDU4LjQ3LjAuMA.."><figcaption>The layers of the earth. Photo by Wikimedia Commons / CC-BY-SA 4.0</figcaption></figure><p>The Earth’s inside has different layers. There’s the inner and outer core. Above it is the mantle, and on top of it is the crust or the Earth’s surface. Researchers study the inside of the planet for various purposes. Over the last few decades, such research has revealed two masses in the lower mantle, near the core’s boundary.</p><p>One mass is beneath South Africa, and the other is beneath the Pacific Ocean. They are different in density and composition from the surrounding material. These regions may have been there for billions of years. Scientists aren't sure how these masses ended up in the mantle. But, the new study says they could have come from Theia.</p><h5>How did the scientists conduct the study?</h5><p>The scientists used a simulation of the collision to demonstrate that a portion of Theia's mantle may have been transferred to the Earth's lower mantle. They also analysed the evolution of the Earth's insides to determine where the Theia remnants might be hidden and how they might have changed with time.</p><p>The simulations showed that the collision may have resulted in the formation of the two masses and the Moon. Some part of Theia may have mixed with the Earth, due to which the two masses are seen today, while other debris produced the Moon.</p>

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