These fossil ammonites have lost their outer coating of shell, revealing the iridescent nacre beneath. Now extinct, ammonites were a group of marine mollusks that first appeared about 409 million years ago, persisting until the extinction event that wiped out the dinosaurs about 66 million years ago. Credit: Florida Museum photo by Jeff Gage

Rise of marine predators reshaped ocean life as dramatically as mass...

Fossil of Dickinsonia, an Ediacaran-era animal. (Mary Droser/UCR)

Research shows we’re surprisingly similar to Earth’s first animals

Reconstruction of the crown of Paratingia wuhaia sp. nov.

‘Pompeii of prehistoric plants’ unlocks evolutionary secret

The Cinders lava flow Utah

Unusual earthquakes highlight central Utah volcanoes

Volcanic plume associated with the April-May 2010 eruption of Eyjafjallajökull volcano (Iceland) and Scanning Electron Microscope image of a typical ash cluster made of micrometric volcanic particles collected on an adhesive paper during fallout. © UNIGE, Costanza Bonadonna

How do you know where volcanic ash will end up?

The asteroid impact led to the extinction of 75% of life, including all non-avian dinosaurs. Credit: Willgard Krause/Pixabay.

Asteroid dust found in crater closes case of dinosaur extinction

Using a method to better locate the source of weak tremors from regions with complex geological features, researchers found that many tremors originate from the shear zone, an area of high fluid pressure, in the Nankai Trough, which is schematically shown here with structures of tectonic plates and fault lines.

Making sense of commotion under the ocean to locate tremors near...

A transmitted light view through a 200-micron section of a peridotite sample, showing the three main minerals - olivine (clear-green), orthopyroxene (grey-green) and garnet (pink). Credit: Dr Emma Tomlinson, Trinity College Dublin.

A new, clearer insight into Earth’s hidden crystals

1.2 million year old mammoth tooth from the Krestovka mammoth. Credit: Pavel Nikolskiy

World’s oldest DNA reveals how mammoths evolved

Swamp Skink (Lissolepis coventryi), which is probably the living lizard most similar to the new fossil. Photo: Dr Mark Hutchinson, SA Museum / Flinders University, a co-author. Credit: Dr Mark Hutchinson, SA Museum / Flinders University

Proegernia mikebulli : New Australian fossil lizard

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