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Sci-News.com: Breaking Science News

New images and video from the Mars Perseverance Rover.

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

Content provided by "Sci-News.com."

Accessed on 22 February 2021, 2316 UTC, Post 147.

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

Hot Super-Earth Found around Gliese 740

An artist’s impression of the super-Earth planet Gliese 740b and its parent star. Image credit: Sci-News.com.

A team of astronomers from Spain, Italy and Germany has discovered a short-period super-Earth exoplanet circling the nearby red dwarf Gliese 740. An artist’s impression of the super-Earth planet Gliese 740b and its parent star. Image credit: Sci-News.com. Gliese 740 is a bright M1-type star located 36.2 light-years away in the constellation of Serpens. Otherwise known as GJ 740, HD 176029, LHS...

SPACE EXPLORATION

Perseverance Team Releases New Images, Video of Rover’s Landing

Perseverance’s Navcams captured this view of the rover’s deck on February 20, 2021. This view provides a good look at PIXL (the Planetary Instrument for X-ray Lithochemistry), one of the instruments on the rover’s stowed arm. Image credit: NASA / JPL-Caltech.

NASA’s Mars 2020 Perseverance mission captured footage of its rover landing in Jezero Crater on February 18, 2021. The footage was captured by several cameras that are part of the rover’s entry, descent, and landing suite. The views include a camera looking down from the spacecraft’s descent stage, a camera on the rover looking up at the descent stage, a camera on the top of the aeroshell...

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...

PALEONTOLOGY

Cretaceous-Era Coelacanths Grew As Big As Great White Sharks

The ossified coelacanth lung from Morocco and its likely position as the anterior chamber in a mawsoniid coelacanth. Image credit: University of Portsmouth.

Paleontologists in Morocco have unearthed a crushed ossified lung of an enormous marine coelacanth that lived during the Late Cretaceous epoch, about 66 million years ago. The ossified coelacanth lung from Morocco and its likely position as the anterior chamber in a mawsoniid coelacanth. Image credit: University of Portsmouth. Coelacanths are a group of primitive deep-dwelling fish closely related...

BIOLOGY

Biologists Find Almost 143,000 Bacteriophage Species in Human Gut

Camarillo-Guerrero et al. introduce the Gut Phage Database, a collection of 142,809 non-redundant viral genomes (>10 kb) obtained by mining a dataset of 28,060 globally distributed human gut metagenomes and 2,898 reference genomes of cultured gut bacteria. Image credit: Camarillo-Guerrero et al., doi: 10.1016/j.cell.2021.01.029.

A team of biologists from the Wellcome Sanger Institute, the European Bioinformatics Institute and the Universidad de los Andes has identified 142,809 species of bacteriophages — viruses that infect and replicate in bacteria — living in the human gut. Camarillo-Guerrero et al. introduce the Gut Phage Database, a collection of 142,809 non-redundant viral genomes (>10 kb) obtained by...

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...

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...

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...

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...

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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