Halite

Rare fossilized embryos more than 500 million years old found

Reef fish arrived in two waves, before and after mass extinction...

Gyrolite

Mars: Gusev Crater once held a lake after all, scientist says

Gypsum

Scientists reconstruct ancient impact that dwarfs dinosaur-extinction blast

Study tests theory that life originated at deep sea vents

Grunerite

Inbreeding in woolly mammoths: Neck rib provide clues about decline and...

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