Astronomy

Webb and Hubble Telescopes Capture Saturn in Unprecedented Detail

These Webb (left) and Hubble (right) images reveal Saturn in infrared and visible light. Image credit: NASA / ESA / CSA / STScI / A. Simon, NASA-GSFC / M. Wong, University of California / J. DePasquale, STScI.

By combining infrared observations from the NASA/ESA/CSA James Webb Space Telescope with visible-light imagery from the NASA/ESA Hubble Space Telescope, astronomers have produced new views of Saturn, revealing atmospheric bands, storms and brilliantly reflective rings. These Webb (left) and Hubble (right) images reveal Saturn in infrared and visible light. Image credit: NASA / ESA / CSA / STScI /...

Archaeology

2,400-Year-Old Iron-Smelting Workshop Unearthed in Senegal

A pile of tuyères at the site of Didé West 1 in Senegal. Image credit: Anne Mayor.

Excavations at the archaeological site of Didé West 1 in eastern Senegal have uncovered an exceptionally well-preserved iron-smelting workshop dated between the 4th century BCE and the 4th century CE, representing nearly eight centuries of activity. A pile of tuyères at the site of Didé West 1 in Senegal. Image credit: Anne Mayor. In Europe, the Iron Age is generally dated from around 800 BCE...

Paleontology

Gigantic Prehistoric Dragonfly-Like Insects May Not Owe Their Size to Oxygen: Study

Gigantic griffinfly in a Carboniferous forest.

Long thought to be fueled by increased atmospheric oxygen concentration, enormous griffinflies from the Carboniferous period, 300 million years ago, may have grown large for other reasons, according to new research led by University of Pretoria paleontologist Edward Snelling. Gigantic griffinfly in a Carboniferous forest. In the 1990s, scientists suggested a period of high atmospheric oxygen around...

Biology

Chimpanzee’s Drum Solo Offers Clues to Origins of Music

Ayumu the chimpanzee spontaneously produced long, multicomponent instrumental displays by drumming, dragging, and throwing self-detached objects. Transition and rhythm analyses revealed non-random sequencing partially resembling pant-hoot structure, predominantly isochronous timing, and a more stable tempo when using tools than with the body. Accompanying play-face and silent bared teeth expressions suggest high arousal and positive affect, supporting the idea that affective vocal expression can be externalized through instrumental sound. Image credit: Hattori et al., doi: 10.1111/nyas.70239.

Researchers who analyzed dozens of spontaneous performances by a captive male chimpanzee named Ayumu say the animal’s steady rhythms and expressive ‘play face’ hint at how early humans may have transformed vocal emotion into instrumental sound. Ayumu the chimpanzee spontaneously produced long, multicomponent instrumental displays by drumming, dragging, and throwing self-detached objects. Transition...

Physics

Physicists Find First Experimental Evidence of Elusive Critical Point in Supercooled Water

You et al. studied supercooled water at timescales before ice formation by heating high- and low-density amorphous ices using infrared ultrafast laser pulses, followed by X-ray scattering; they observed a rapid increase in the heat capacity indicating a critical divergence at 210 K coincident with enhanced density fluctuations. Image credit: POSTECH University.

By probing supercooled water with ultrafast lasers before it crystallizes, physicists at Stockholm University observed telltale signs of a long-theorized transition between two liquid states, including surging heat capacity and critical fluctuations. You et al. studied supercooled water at timescales before ice formation by heating high- and low-density amorphous ices using infrared ultrafast laser...

Genetics

Ancient DNA Study Rewrites Origins of Europe’s First Dogs

Canadian Eskimo dogs. Illustration by John James Audubon and John Bachman (1845-1848).

Scientists have extracted and analyzed DNA from 216 canid remains, including 181 from Paleolithic and Mesolithic Europe. The oldest data that they recovered are from a 14,200-year-old dog from the Kesslerloch site in Switzerland. Their results suggest that domesticated dogs (Canis lupus familiaris) predate farming and share deep ancestry with wolves (Canis lupus) from Eurasia, challenging ideas about...