Comet

The comet that killed the dinosaurs

mosasaurs

The songs of fin whales offer new avenue for seismic studies...

Photos of Nubian Levallois cores associated with Neanderthal fossils. Credit © UCL, Institute of Archaeology & courtesy of the Penn Museum, University of Pennsylvania

Neanderthals and Homo sapiens used identical Nubian technology

The colorful banded Tepees are part of the Blue Mesa Member, a geological feature about 220 million to 225 million years old in the Chinle Formation in Petrified Forest National Park in Arizona. Credit: NPS

How rocks rusted on Earth and turned red

Rock samples collected near the Antarctic volcano Mount Erebus, seen here in the distance, harbor fingerprints of Earth’s ancient magnetic field. A new analysis delves into discrepancies between these fingerprints and predictions from a long-standing approximation of the field. Credit: Hanna Asefaw

Antarctic Lava Yields Clues to Earth’s Past Magnetic Field

Several types of dinoflagellates are shown in this microscope image. Some dinoflagellates are classified as nanoplankton, which new research shows have a more important role in Earth’s biological pump than previously thought. Credit: fickleandfreckled, CC BY 2.0

The Role of Midsized Phytoplankton in Earth’s Biological Pump

Mylonite is a fine-grained, compact metamorphic rock produced by dynamic recrystallization of the constituent minerals resulting in a reduction of the grain size of the rock. Credit: Wikipedia

Going with the grains to explain a fundamental tectonic force

Professor Cathryn Newton studies Middle Devonian marine faunas (such as these brachiopods from 380-390 million years ago), whose fossils are lodged in a unit of bedrock in Central New York. Credit: Syracuse University

Diving into Devonian seas: Ancient marine faunas unlock secrets of warming...

The newly named trace fossil Glossifungites gingrasi is a collection of burrows that were home to water-dwelling insects, similar to mayflies, more than 90 million years ago. (Photo: Ryan King)

Newly discovered fossil, likely subaqueous insect

Scientists identified flank instability at Pacaya, an active volcano in Guatemala. Credit: Kirsten Stephens/Penn State

Scientists identify flank instability at a volcano with history of collapse

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