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Getting to the Core Finally, we're filling in the last big blank.

A Hotspot Alternative A no-plumes mantle model turns deep-Earth science on its head.

A Hubble Telescope Into Earth The USArray traveling seismic show will carpet a continent.

What Is the Mantle? (Into the Mantle 1) Down there is a hot zone in the Earth and in Earth science.

The Diamond Zone (Into the Mantle 2) The mantle is out of reach, but you may be wearing a piece of it.

Spouts Beneath Plates (Into the Mantle 3) Hotspots are signs of something deep going on.

Sounding Deep Earth (Into the Mantle 4) How we take "ultrasound baby pictures" of the mantle.

The Big Squeeze (Into the Mantle 5) Probing high pressures with the diamond anvil cell.

A Guided Mantle Tour (Into the Mantle 6) Take a trip downward from here to hell, or thereabouts.

The Secret Ingredient (Into the Mantle 7) Water sets apart Earth's from other planets' mantles.

The Lava-Lamp Earth The old stoner's toy inspires a new picture of the mantle.

Length-of-Day Studies Each day differs from the next by microseconds, for deep-seated reasons.

The Nuclear Core A maverick geoscientist says the core has a giant natural reactor.

"Prime" Time The "D-double-prime" layer at the mantle's base is offered a new name.

Rhenium and Osmium Studies We extract deep planetary information from two exceedingly rare metals.

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