New Zone Inside the Earth Proposed

A first-time experimental recreation of the crushing, searing conditions within the Earth's lower mantle has led geophysicists to a surprising proposal that there is a new zone of rock within the planet.

The research suggests that a section of the Earth's brittle mantle about 620 to 1,365 miles (1,000 to 2,200 kilometers) deep actually is a "transitional zone" where the rock turns into a strange, incredibly dense state.

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