Astronomers with the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) have detected enormous hydrogen halos, called Lyman-alpha nebulae, around more than 30,000 galaxies 10 billion to 12 billion years ago, suggesting the raw material for galaxy growth was far more abundant than once thought. An enormous halo of hydrogen gas found in HETDEX data and superimposed over its location as seen in...

A new nanoscale analysis of the Bennu sample OREX-800066-3 returned by NASA’s OSIRIS-REx mission shows that organic compounds and minerals cluster into distinct regions, suggesting water once altered the asteroid in uneven, localized ways. This mosaic image of asteroid Bennu is composed of 12 images collected on December 2, 2018 by OSIRIS-REx’s PolyCam instrument from a range of 15 miles (24...

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...

An assemblage of more than 700 Ediacaran fossils from the end of the Ediacaran period indicates that key animal groups — including early relatives of vertebrates — were already diversifying millions of years earlier than long believed. Reconstruction of the Jiangchuan Biota. Image credit: Xiaodong Wang. The burst of animal diversification spanning the transition from the Ediacaran to...

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...

New computational simulations suggest ice-giant planets like Uranus and Neptune harbor a quasi-one-dimensional superionic state of carbon hydride that could reshape how scientists understand planetary interiors. Illustration of the predicted hexagonal carbon hydride compound under Neptune-like interior conditions. In this structure, carbon forms the outer spiral chains (yellow) and hydrogen forms...

In new research, University of Galway’s Dr. Martin David Mulligan and his colleagues followed nearly 800 participants from the Framingham Heart Study for more than a decade and a half, examining whether vitamin D levels measured in their 30s were linked to changes in the brain in later life. They found that individuals with higher circulating levels of vitamin D had lower accumulations of tau —...

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...

By tracing magnetic signals preserved in 3.5-billion-year-old rocks in Western Australia, geoscientists have found the oldest direct evidence yet that parts of the planet’s outer shell were shifting across the globe, pushing the origins of plate motion deep into Earth’s early history. Hadean Earth. Image credit: Alec Brenner. “There has been a huge range of ages suggested for timing,” said...

New computational simulations suggest ice-giant planets like Uranus and Neptune harbor a quasi-one-dimensional superionic state of carbon hydride that could reshape how scientists understand planetary interiors. Illustration of the predicted hexagonal carbon hydride compound under Neptune-like interior conditions. In this structure, carbon forms the outer spiral chains (yellow) and hydrogen forms...