Breaking Science News|Sci-News

Welcome to a “Breaking Science News” update from Hawaii Science Digest.  Views expressed in this science and technology news summary are those of the reporters and correspondents.  Content provided by “Sci-News.”

Accessed on 25 March 2019, 0010 UTC.

Source:  http://www.sci-news.com.  Please click link or scroll down to read your selections.

NOMY

Earth is Devolatilized Version of Sun, Planetary Researchers Say

Wang et al compared new protosolar elemental abundances with recent estimates of bulk Earth composition. Image credit: Orlando PIRO4D.A team of planetary scientists at the Australian National University found that our planet is made of the same elements as the Sun but has less of the volatile elements such as hydrogen, helium, oxygen and nitrogen. Wang et al compared new protosolar elemental abundances with recent estimates of bulk Earth composition. Image credit: Orlando PIRO4D. “The composition of a rocky planet is one of the…

SPACE EXPLORATION

Asteroid Ryugu: First Science Results from JAXA’s Hayabusa-2 Mission

This image of the asteroid Ryugu was captured by the Optical Navigation Camera - Telescopic (ONC-T) on JAXA’s Hayabusa-2 spacecraft on June 26, 2018, from a distance of 13.7 miles (22 km). Image credit: JAXA / University of Tokyo / Kochi University / Rikkyo University / Nagoya University / Chiba Institute of Technology / Meiji University / Aizu University / AIST.In June 2018, the Japanese Aerospace Exploration Agency (JAXA) spacecraft and sample return mission Hayabsua-2 arrived at the near-Earth asteroid 162173 Ryugu. The first scientific results from the mission, published this week in a trio of papers in the journal Science, portray Ryugu as a porous ‘pile of rubble.’ This image of the asteroid Ryugu was captured by the Optical Navigation Camera –…

ARCHAEOLOGY

Archaeologists May Have Found Long-Lost Monastery of Princess Aebbe

Coldingham Priory. Image credit: DigVentures / Aerial Cam.A team of professional and amateur archaeologists believe they may have discovered the monastery of Aebbe (615-683 CE), a powerful Anglo-Saxon woman who helped shape British history. Coldingham Priory. Image credit: DigVentures / Aerial Cam. Born a pagan princess, Aebbe (Æbbe of Coldingham) was the daughter of King Ethelfrith of Bernicia and Acha of Deira. Bernicia and Deira were Anglo-Saxon kingdoms in…

PALEONTOLOGY

Evidence from Chile Supports Younger Dryas Extraterrestrial Impact Hypothesis

An artist’s impression of an asteroid hitting the Earth. Image credit: State Farm / CC BY 2.0.The Younger Dryas impact hypothesis, also known as Clovis comet hypothesis, posits that the hemisphere-wide debris field of a large, disintegrating asteroid (or comet) struck North America, South America, Europe, and western Asia approximately 12,800 years ago. This event triggered extensive biomass burning, brief impact winter, climate change, and contributed to extinctions of late Pleistocene megafauna….

BIOLOGY

Sun Bears Can Mimic Facial Expressions of Their Playmates

The sun bear (Helarctos malayanus) at Alma Park Zoo, Brisbane, Australia. Image credit: Andrew Napier / CC BY 2.0.A new study published in the journal Scientific Reports provides evidence that sun bears (Helarctos malayanus), a typically solitary species, have the ability to mimic the expressions of their conspecifics and that they do so by matching the exact facial variants they interact with. It is the first time exact facial mimicry has been seen outside of humans and gorillas. The sun bear (Helarctos malayanus)…

PHYSICS

Physicists Observe Matter-Antimatter Asymmetry in Charm Particle Decays

The LHCb magnet. Image credit: CERN.Physicists from the Large Hadron Collider beauty (LHCb) Collaboration at CERN have observed, for the first time, the matter-antimatter asymmetry known as charge-parity (CP) violation in the decays of a D0 meson, a subatomic particle made up of a charm quark and an up antiquark. The LHCb magnet. Image credit: CERN. The term CP refers to the transformation that swaps a particle with the mirror image…

MEDICINE

Drinking Very Hot Tea Increases Risk of Esophageal Cancer, Study Shows

Drinking hot tea increases the risk of esophageal cancer. Image credit: Fxxu.Drinking hot tea elevates the risk of esophageal squamous cell carcinoma, one of the two major types of esophageal cancer, by about 90%, according to a new study. Drinking hot tea increases the risk of esophageal cancer. Image credit: Fxxu. “Our results substantially strengthen the existing evidence supporting an association between hot beverage drinking and esophageal squamous cell carcinoma (ESCC),”…

GENETICS

Hepatitis B DNA Helps Trace History and Movement of First Australians

Depiction of the Jarijari (Nyeri Nyeri) people near Merbein engaged in recreational activities, including a type of Aboriginal football, by William Blandowski & Gustav Mützel, 1857.It’s widely accepted that continental Sahul, the combined landmass of Australia, New Guinea and Tasmania, was settled very early in human history. But the exact entry point and timing of ancient human migration into Sahul, which was eventually split by rising sea levels, is a question that has plagued paleoanthropologists. That is until now. And unexpectedly it’s a virus called hepatitis B providing…

GEOLOGY

Earth is Devolatilized Version of Sun, Planetary Researchers Say

Wang et al compared new protosolar elemental abundances with recent estimates of bulk Earth composition. Image credit: Orlando PIRO4D.A team of planetary scientists at the Australian National University found that our planet is made of the same elements as the Sun but has less of the volatile elements such as hydrogen, helium, oxygen and nitrogen. Wang et al compared new protosolar elemental abundances with recent estimates of bulk Earth composition. Image credit: Orlando PIRO4D. “The composition of a rocky planet is one of the…

OTHER SCIENCES

Hepatitis B DNA Helps Trace History and Movement of First Australians

Depiction of the Jarijari (Nyeri Nyeri) people near Merbein engaged in recreational activities, including a type of Aboriginal football, by William Blandowski & Gustav Mützel, 1857.It’s widely accepted that continental Sahul, the combined landmass of Australia, New Guinea and Tasmania, was settled very early in human history. But the exact entry point and timing of ancient human migration into Sahul, which was eventually split by rising sea levels, is a question that has plagued paleoanthropologists. That is until now. And unexpectedly it’s a virus called hepatitis B providing…

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