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Tom Metcalfe

A series of structures that look like electrical poles extend into the distance on an icy surface. The sky above is full of stars and streaked with green aurorae.
Posted inNews

A Weak Spot in Earth’s Magnetic Field Is Going from Bad to Worse

by Tom Metcalfe 10 November 202510 November 2025

This could be bad news for satellites and spacefarers.

An image of the Milky Way, as seen from the Chilean desert.
Posted inNews

Zircon Crystals Could Reveal Earth’s Path Among the Stars

by Tom Metcalfe 10 October 202510 October 2025

Researchers found signs of melting in zircon crystals in the crust that correspond to our planet’s journey through the galaxy’s spiral arms.

Swirly white and black rock
Posted inNews

From First Continents to Fancy Countertops

by Tom Metcalfe 18 April 202420 June 2024

A new study suggests melting gabbros may have helped form Earth’s first continents, riling a long-standing debate.

Over a dark blue-green square appear the words Special Report: The State of the Science 1 Year On.

Features from AGU Publications

Research Spotlights

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Editors' Highlights

Opening a Treasure Trove: A Trip to the Historic Archives of Venus

13 March 202612 March 2026
Editors' Vox

Introducing the New EIC of Paleoceanography and Paleoclimatology

12 March 202612 March 2026
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