A tiny sample of goldschmidtite found inside a diamond by U of A PhD student Nicole Meyer. The newly discovered mineral has high concentrations of elements seldom found in Earth’s mantle, suggesting it formed under extreme conditions. Credit: Nicole Meyer

Student discovers unusual new mineral inside a diamond

Illustration of the giant asteroid collision in outer space that produced the dust that led to an ice age on Earth. Credit: (c) Don Davis, Southwest Research Institute

Dust from a giant asteroid crash caused an ancient ice age

Photographs of alkaline magmatic intrusions in Greenland. The region was volcanically and tectonically active around 1.2 billion years ago. Although no longer active, it is of major interest to geologists because the subsequent uplift and glacial erosion have cut deep into the rift and exposed the magma chambers that once lay well below the surface. Greenland’s magmas were sourced from a mantle that was enriched and contaminated by ancient crustal materials. Credit: University of St Andrews

Ancient volcanoes reveal Earth’s recycled crust

The mineral olivine contains melt inclusions (black dots), just a few micrometers in size. The geochemists isolated these inclusions and investigated the isotopic composition with mass spectrometers. Credit: Münster University - Felix Genske

Geochemists measure new composition of Earth’s mantle

An artist's interpretation of the asteroid impact that wiped out all non-avian dinosaurs. Credit: NASA/Don Davis.

Rocks at asteroid impact site record first day of dinosaur extinction

Cryodrakon boreas. Credit David Maas

New reptile species was one of largest ever flying animals

Jurassic crocodile. Artist's impression (credit: Julia Beier)

Jurassic crocodile identified 250 years after fossil find

Origin of eukaryotes

Scientists identify rare evolutionary intermediates to understand the origin of eukaryotes

Giant extinct kangaroo

Giant Kangaroo Had Crushing Bites

Prof. Michael Coates holds a 3-D printed model of the Tristychius skull and jaws. Photo courtesy of Matt Wood

3-D reconstructions show how ancient sharks found an alternative way to...

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