Life's history in iron

A new study examines how Earth's oldest iron formations could have been formed before oxygenic photosynthesis played a role in oxidizing iron.

Ocean floor sediments explain arid U.S. Southwest

(Phys.org)—Surface-dwelling algae adjust their biochemistry to surface temperatures. As they die and sink to the bottom, they build a sedimentary record of sea-surface temperature across millennia. Brown's work on surface ...

Study finds effect of Earth's orbit on ancient microorganisms

Curtin University researchers studying molecular fossils or "biomarkers" from deep beneath the Chicxulub impact crater have found evidence of how microorganisms changed in response to fluctuations in the Earth's climate, ...

What happened to Helike?

There is little to see today of Helike, just a few walls and artefacts scraped clean by archaeologists.

Rock-solid archives record variations in the Earth's orbit

The shape of Earth's orbit around the sun and the orientation of its axis undergo regular variations over periods of thousands to millions of years. These variations—known as Milankovitch cycles after the Serbian geophysicist ...

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