Basalt, the most-common rock on Earth’s surface, encases green crystals--a geologic "nesting doll" phenomenon called a xenolith. Basalts such as this one derive from a section of the mantle that has been depleted in incompatible trace elements, which is usually attributed to continental crust formation. In their work, Tucker and his collaborators propose another mechanism that would impart this signature. Credit: Carnegie Institution for Science

Probing the origin of the mantle’s chemically distinct ‘scars’

The largest and the smallest: dinosaurs reached an amazing range in size through the Mesozoic Era. Credit: Vitor Silva

How to weigh a dinosaur

Mukawaryu

Using math to examine the sex differences in dinosaurs

Surface displacement mapped using InSAR satellite imaging data. Along the fault, the ground was either raised (southeast) or collapsed (northwest). The star designates the epicentre. Credit: Jean-François RITZ et al

The Le Teil earthquake provides new insights on seismic risk in...

The fossil on the right is a complete specimen of Gyaltsenglossus senis (ROMIP 65606.1) showing full length of the proboscis with the six feeding arms at the top. Illustration by Emily S. Damstra. Both images © Royal Ontario Museum

A Bizarre Half Billion-Year Old Worm with Tentacles Solves Evolutionary Mystery

The Titanosaurian embryo skull along with a skull and head reconstruction. Credit: Kundrat et al. /Current Biology

First 3D look at an embryonic sauropod dinosaur reveals unexpected facial...

Life restoration of Lystrosaurus in a state of torpor. Credit: Crystal ShinLife restoration of Lystrosaurus in a state of torpor. Credit: Crystal Shin

Fossil evidence of ‘hibernation-like’ state in 250-million-year-old Antarctic animal

The first complete dinosaur skeleton ever identified has finally been studied in detail and found its place in the dinosaur family tree, completing a project that began more than a century and a half ago. Credit: John Sibbick

Scelidosaurus : First complete dinosaur skeleton ever found is ready for...

Earth

The age of Earth’s inner core revised

Closeup of the stomach area of a fossil ichthyosaur, Guizhouichthyosaurus, showing part of the body of another large marine reptile. The ichthyosaur had swallowed its prey shortly before it died and was fossilized. This is the oldest known direct evidence of megapredation, or a large animal eating another large animal. (Da-Yong Jiang, et al.)

Ichthyosaur’s last meal is evidence of Triassic megapredation

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