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Tom Metcalfe

Two maps of Earth show areas highlighted in red and blue. In the image called “nonelliptical geoid,” the darkest blue area is in the Indian Ocean. In the image labeled “nonhydrostatic geoid,” the darkest blue area is over Antarctica.
Posted inNews

Scientists Remap Earth’s Gravity

by Tom Metcalfe 26 March 202626 March 2026

An uncommon way of looking at the world reveals the evolution of a deep gravity hole beneath Antarctica.

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

How Internal Waves Transport Energy Thousands of Miles Across the Ocean

26 March 202626 March 2026
Editors' Highlights

Resolved Storm-Environment Interactions: Linking Local to Global Scales

9 April 20266 April 2026
Editors' Vox

Distant Cousins? How Field Work on Earth Could Help Us to Better Understand Titan

9 April 20268 April 2026
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