Not surprisingly, scientists have long wondered what lies at the very center of the Earth. The latest research supports a theory that our blue planet holds an iron ball in the middle, in its metallic core – a startling discovery.

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Beneath Earth’s outer layer, the mantle and its outer core of molten liquid is, according to a new study, the Earth’s solid metallic center – which actually has a hidden layer, or ‘innermost inner core’ .

The stupendous discovery suggests Earth has five main layers instead of four, and offered new details that scientists could use to help unravel some of the oldest mysteries about our planet and how it formed.

Geoscientists first suggested that Earth’s core might have an imperceptible extra layer about 20 y