Earth & Environment

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iron

PRECIOUS METAL  Geochemists explore platinum, gold and other rare elements that are attracted to iron to understand how Earth's core formed billions of years ago. 

Themisto libellula amphipod

Even organisms that live in open waters of the Arctic, such as this Themisto libellula amphipod, get a lot of their carbon from algae that live in sea ice, a new study finds.

air bubbles in a rock

NOT-SO-FRESH AIR  Ancient air embedded inside rock salt for 815 million years suggests that oxygen was already abundant when the first animals appeared. The microscopic air bubbles were trapped inside rectangular inclusions (one circled in red) in the rock.

Earth & Environment

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