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Sci-News.com: Breaking Science News

Here are today's top science stories compiled by "Sci-News.com."

Views expressed in this science and technology update are those of the reporters and correspondents.

Content provided by "Sci-News.com."

Accessed on 19 February 2021, 2355 UTC, Post 142.

Source:  http://www.sci-news.com

Please click link or scroll down to read your selections.

Thanks for joining us today.

Russ Roberts

https://www.hawaiisciencedaily.info

ASTRONOMY

Cygnus X-1’s Stellar-Mass Black Hole is More Massive than Astronomers Thought

An artist’s impression of the Cygnus X-1 binary system. Image credit: International Centre for Radio Astronomy Research.

A black hole in the Cygnus X-1 binary system is so massive that it challenges current stellar evolution models. An artist’s impression of the Cygnus X-1 binary system. Image credit: International Centre for Radio Astronomy Research. Discovered in 1964, Cygnus X-1 is an X-ray binary system located in the constellation Cygnus. The primary star, HD 226868, is a hot supergiant revolving about an unseen...

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SPACE EXPLORATION

NASA’s Perseverance Rover Successfully Lands on Mars

Perseverance’s first image (colorized) from Jezero Crater, Mars. Image credit: NASA’s Jet Propulsion Laboratory.

After a 203-day journey, NASA’s car-sized Perseverance rover successfully landed in Jezero Crater on Mars on February 18, 2021. Confirmation of the successful touchdown was announced in mission control at NASA’s Jet Propulsion Laboratory at 3:55 p.m. EST (12:55 p.m. PST, 8:55 p.m. GMT). The Mars 2020 Perseverance rover mission will address high-priority science goals for Mars exploration. Equipped...

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ARCHAEOLOGY

Iron Age Settlement and Roman Villa Unearthed in England

DigVentures archaeologist Ben Swain shows of the size of the largest roundhouse, with the hillfort in the background. Image credit: DigVentures.

A team of archaeologists from DigVentures has uncovered the remains of at least 15 roundhouses dating from 400 to 100 BCE and the remains of a large Roman villa built over the abandoned homes in the late 3rd to early 4th century CE. DigVentures archaeologist Ben Swain shows of the size of the largest roundhouse, with the hillfort in the background. Image credit: DigVentures. The Iron Age settlement...

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PALEONTOLOGY

Researchers Find Ingredients for Microbial Life in 3.5-Billion-Year-Old Rocks

Barite associated with originally sulfidic stromatolites in the Dresser mine in Western Australia. Image credit: Mißbach et al., doi: 10.1038/s41467-021-21323-z.

A team of geobiologists from Germany has found biologically-relevant primordial organic molecules and gases in fluid inclusions trapped in 3.5-billion-year-old barites from the Dresser mine, Marble Bar, Australia. Location of the Dresser mine in Western Australia (a) and black barite associated with originally sulfidic stromatolites at the sampling site (b) and in the working area (c). The close...

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BIOLOGY

New Species of Reef-Dwelling Fish Discovered

Coralliozetus clausus. Image credit: Phil Hastings.

A marine biologist from Scripps Institution of Oceanography has discovered a new species of chaenopsid blenny in the waters around Cocos Island (Isla del Coco), which lies about 563 km (350 miles) off the Pacific coast of Costa Rica. Coralliozetus clausus. Image credit: Phil Hastings. Blennies are a group of over 900 species of fishes found in coastal areas throughout the world’s oceans. They are...

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PHYSICS

Scientists Create New Crystalline Form of Ice

Illustration showing the relationship between ice VI and XIX unit cells viewed down their c-axes, and the differences in their diffraction patterns, with color coding red for ice XIX and blue for ice VI. Image credit: University of Innsbruck.

Ice XIX is the second hydrogen-partially-ordered phase of ice VI, a previously known form of ice that exists at pressures around 1 GPa and temperatures between 130 and 355 K. Illustration showing the relationship between ice VI and XIX unit cells viewed down their c-axes, and the differences in their diffraction patterns, with color coding red for ice XIX and blue for ice VI. Image credit: University...

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MEDICINE

Apples Contain Pro-Neurogenic Compounds in Both Their Peel and Flesh: Study

Quercetin and DHBA, natural compounds found in apples, are pro-neurogenic. Image credit: Ichwan et al., doi: 10.1016/j.stemcr.2021.01.005.

Quercetin and 3,5-dihydroxybenzoic acid (DHBA), phytonutrients commonly found in apples, may help stimulate the production of new brain cells, according to a study published in the journal Stem Cell Reports. Quercetin and DHBA, natural compounds found in apples, are pro-neurogenic. Image credit: Ichwan et al., doi: 10.1016/j.stemcr.2021.01.005. Dr. Gerd Kempermann from the Technische Universität...

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GENETICS

Researchers Sequence 1.2-Million-Year-Old Mammoth DNA

Life reconstruction of the steppe mammoth (Mammuthus trogontherii). Image credit: Beth Zaiken / Centre for Palaeogenetics.

An international team of scientists has sequenced and analyzed DNA from three mammoth specimens, two of which are more than one million years old. The results show that two distinct mammoth lineages were present in eastern Siberia during the Early Pleistocene; one of these lineages gave rise to the woolly mammoth (Mammuthus primigenius) and the other represents a previously unrecognized lineage that...

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GEOLOGY

New Mineral Discovered in United Kingdom: Kernowite

Kernowite (green color). Image credit: The Trustees of the Natural History Museum, London.

Kernowite is a new mineral that has been found only in an old specimen collected at a single location in Cornwall, UK. Kernowite (green color). Image credit: The Trustees of the Natural History Museum, London. The only known specimen of kernowite, named after Kernow which is the Cornish word for Cornwall, was collected in the 1700s. It became part of the Natural History Museum, London’s geological...

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OTHER SCIENCES

Scientists Create New Crystalline Form of Ice

Illustration showing the relationship between ice VI and XIX unit cells viewed down their c-axes, and the differences in their diffraction patterns, with color coding red for ice XIX and blue for ice VI. Image credit: University of Innsbruck.

Ice XIX is the second hydrogen-partially-ordered phase of ice VI, a previously known form of ice that exists at pressures around 1 GPa and temperatures between 130 and 355 K. Illustration showing the relationship between ice VI and XIX unit cells viewed down their c-axes, and the differences in their diffraction patterns, with color coding red for ice XIX and blue for ice VI. Image credit: University...

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