Earth's mysterious core

• Earth's core has baffled researchers for decades, and it still contains many secrets.
• Recent studies show this hot furnace buried deep under our feet is weirder than we think.
• The inner core may be spinning, and scientists think it is encased by an ancient ocean floor.

The Earth's mysterious core is crucial to every part of life on our planet.

This furnace of molten metal, which lies about 1,800 miles beneath our feet, keeps our atmosphere intact and protects us from being bombarded by solar radiation.

But scientists still don't really understand exactly how it works. We can't go down there, for obvious reasons, so researchers have to rely on shockwaves traveling through Earth to give us clues into what's really going on in our planet's heart.

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