May 1, 2018
Are diatoms triggering submarine landslides?
Far beneath the ocean’s surface, puzzling deposits from huge submarine landslides can be found amid expanses of nearly flat ocean floor. Without …
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September 14, 2017
Glass shards reveal a fiery history in Ethiopia
Chains of volcanoes and a lava lake pepper the landscape of the Afar Triangle in northeastern Ethiopia, where eruptions and earthquakes are …
April 19, 2016
Magnesium part of Earth's magnetic field engine
Earth’s magnetic field, which arises from convective flows in the planet’s core, known as the geodynamo, has existed for at least 3.4 billion …
June 16, 2015
Introducing Earth's inner inner core
A humongous hunk of iron — that’s how scientists have long thought of Earth’s solid inner core. But new research suggests there’s more to it than …
January 30, 2015
March 29, 1936: Notes on Earth's Inner Core
On March 29, 1936, Danish seismologist Inge Lehmann wrote a letter to a colleague in which she argued that seismic waves — specifically P-waves — …
January 5, 2012
Of molten iron and magnetism
Since 1999, the German satellite CHAMP (CHAllenging Mini-satellite Payload) has swirled around Earth, keeping watch as the planet’s magnetic …
January 5, 2012
Ancient meteorites reveal early magnetic fields
Even before the birth of the planets, our solar system was hardly a lonely place. Small rocky bodies, called planetesimals, filled the inner …