Types of Rocks

New theories about nature of Earth’s iron

As lava hardens, a revelation bubbles up

CRUST adds new layer of defense against earthquakes, tsunamis

Parts of the Earth’s original crust remain in place today

Going deep to measure Earth’s rotational effects

Copper-bottomed deposits

Paleozoic echinoderm hangover: Waking up in the Triassic

Pattern of mammal dwarfing during global warming

Human skull evolved along with two-legged walking, study confirms

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