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Saturday, 15 July 2023

New explanation for huge gravity hole in the Indian Ocean

 A mysterious ‘gravity hole’ in the Indian Ocean has puzzled scientists for years. What is a ‘gravity hole’, you may ask? It’s not an easy concept to grasp, but we’ll try our best to explain it without getting too technical.

Basically, it’s a large region under the ocean where gravity is weaker than normal, which makes the seafloor sink lower. It’s not a tiny region, either.

It covers about three million square kilometres, which is a huge part of the planet to be unsure about.

So, what causes this ‘gravity hole’? Two brave scientists from India’s Institute of Science – Debanjan Pal and Attreyee Ghosh – have proposed a possible answer.

Their answer involves something that happened 1,000 kilometres – or 621 miles – below the Earth’s surface, where they found a cold and dense area that is the leftover of an ancient ocean that was dragged into a ‘slab graveyard’ under Africa about 30 million years ago, stirring up a lot of melted rock along the way.

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