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Marine Biologists Identify New Species of Beaked Whale

True’s beaked whales (Mesoplodon mirus). Image credit: Roland Edler, Duisburg Zoo.
Oct 27, 2021 by Natali Anderson

The newly-identified species, named the Ramari’s beaked whale (Mesoplodon eueu), occurs throughout temperate southern hemisphere waters, with reports from several locations off South Africa, Australia, and Aotearoa New Zealand. True’s beaked whales (Mesoplodon mirus). Image credit: Roland Edler, Duisburg Zoo. “The Earth’s deep ocean remains less understood than the surface of Mars,” said University of Auckland’s Dr. Emma Carroll and colleagues. “However,...

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A concentration of 2.5 μM EGCG and ECG enhanced health- and lifespan as well as stress resistance in Caenorhabditis elegans. Catechins hampered mitochondrial respiration in Caenorhabditis elegans after 6-12 hrs and the activity of complex I in isolated rodent mitochondria. The impaired mitochondrial respiration was accompanied by a transient drop in ATP production and a temporary increase in ROS levels in Caenorhabditis elegans. After 24 hrs, mitochondrial respiration and ATP levels got restored, and ROS levels even dropped below control conditions. The lifespan increases induced by EGCG and ECG were dependent on AAK-2/AMPK and SIR-2.1/SIRT1, as well as on PMK-1/p38 MAPK, SKN-1/NRF2, and DAF-16/FOXO. Long-term effects included significantly diminished fat content and enhanced SOD and CAT activities, required for the positive impact of catechins on lifespan. Image credit: Tian et al., doi: 10.18632/aging.203597.

Study: Green Tea Catechins Extend Health- and Lifespan, Reduce Fat Content in Model Organism

Oct 27, 2021 by Enrico de Lazaro

Green tea is one of the most widely consumed beverages worldwide. Green tea catechins are associated with a delay in aging. In experiments performed in...

The 2,000-year-old amethyst seal found in Jerusalem, Israel. Image credit: Israel Antiquities Authority.

2,000-Year-Old Amethyst Seal Found in Israel

Oct 27, 2021 by News Staff

An amethyst gemstone seal from the Second Temple period has a unique engraving: a bird and a branch with five fruits, according to the Israel Antiquities...

Indri indri. Image credit: Filippo Carugati.

Indri Lemur Songs Have Categorical Rhythm, New Study Shows

Oct 27, 2021 by News Staff

A lemur species called Indri indri displays, in its coordinated songs, the isochronous and 1:2 rhythm categories seen in human music, showing that such...

LiDAR Reveals 478 Olmec and Maya Ceremonial Complexes in Mexico

Oct 26, 2021 by News Staff

Using a revolutionary technology known as LiDAR (laser imaging, detection and ranging), an international team of archaeologists has discovered 478 rectangular...

Representative Bruguiera gymnorhiza trees in the river side population (left) and the oceanside population (right) along the Okukubi River, the Okinawa main island, Japan. Scale bars - 1 m. Image credit: Miryeganeh et al., doi: 10.1111/nph.17738.

Mangrove Tree Genome Sequenced

Oct 26, 2021 by News Staff

A team of researchers from the Okinawa Institute of Science and Technology Graduate University and University College London has decoded the genome of...

An artist’s impression of the Proxima Centauri system. Image credit: Lorenzo Santinelli.

Signal of Interest from Proxima Centauri Was Not Alien Technosignature, Astronomers Say

Oct 26, 2021 by Natali Anderson

In 2019, astronomers with the Breakthrough Listen project observed Proxima Centauri using CSIRO’s Parkes ‘Murriyang’ radio telescope. They detected...

Bumblebees exhibit remarkable color pattern diversity that is primarily attributed to Müllerian mimicry. Previous research has identified the red-black mimetic color variation in Bombus melanopygus to be driven by genetic changes in a major upstream developmental gene (Hox gene Abd-B) dictating segmental morphology. Using a stage-specific transcriptomic approach, Rahman et al. unravel how this gene ultimately drives the melanic pigmentation differences, identifying a suite of genes from the most upstream Abd-B, to intermediate developmental genes, and finally to a set of interacting downstream melanin and redox genes. Image credit: Rahman et al., doi: 10.1093/gbe/evab080.

Researchers Discover Gene Network that Drives Color Variation in Bumblebees

Oct 26, 2021 by News Staff

A Hox gene, a major developmental gene that regulates the identity of structures on the segments of black-tailed bumblebees (Bombus melanopygus), turns...

This image from ESO’s Very Large Telescope shows the central region of NGC 5248, a spiral galaxy located some 59 million light-years away in the constellation of Boötes. Image credit: ESO / VLT / MUSE / TIMER Survey.

VLT Focuses on Spiral Galaxy NGC 5248

Oct 26, 2021 by Enrico de Lazaro

Astronomers using ESO’s Very Large Telescope (VLT) have imaged the innermost regions of the compact intermediate spiral galaxy NGC 5248. This image from...

False-color image of SN 2020fqv in its host galaxy system NGC 4567 and NGC 4568; the location of the supernova is shown in the inset. The image is composed of a pre-explosion single-band HST/WFPC2 image in the F606W filter with the color information from ground-based images obtained using the Nickel Telescope at Lick Observatory. The image of SN 2020fqv and the area outside of HST field of view is also from Nickel. Image credit: Joseph Depasquale / STScI.

Astronomers Observe ‘Rosetta Stone of Supernovae’

Oct 25, 2021 by News Staff

A Type II core-collapse supernova called SN 2020fqv exploded in NGC 4568, a member of a pair of colliding unbarred spiral galaxies; the other member of...

Obstructive sleep apnea is a condition where the airway closes off during sleep and so the lungs cannot oxygenate the blood adequately. Image credit: Habib M’henni.

Scientists Find Link between Obstructive Sleep Apnea and Blood Triglyceride Levels

Oct 25, 2021 by News Staff

People with more severe obstructive sleep apnea and reductions in blood oxygen concentrations are more likely to have elevated concentrations of triglycerides...

Super-Jupiter Found Circling Very Young, Very Low Mass Star

Oct 25, 2021 by Enrico de Lazaro

The discovery of a super-Jupiter exoplanet around the M-type dwarf star 2MASS J04372171+2651014 challenges models of planet formation by either core accretion...

DeSilva et al. suggest that patterns of human brain evolution were influenced by collective intelligence, a convergent characteristic of diverse group-living animals. Image credit: Gerd Altmann.

Human Brains Decreased in Size 3,000 Years Ago, New Study Says

Oct 25, 2021 by News Staff

Human brain size nearly quadrupled in 6 million years since Homo last shared a common ancestor with chimpanzees, but human brains are thought to have decreased...

This Hubble image shows the barred spiral galaxy NGC 2903. The color image is a composite of separate exposures acquired by Hubble’s ACS and WFC3 instruments. Six filters were used to sample various wavelengths. The color results from assigning different hues to each monochromatic image associated with an individual filter. Image credit: NASA / ESA / Hubble / L. Ho / J. Lee / PHANGS-HST Team.

Hubble Captures Striking New Image of Spiral Galaxy NGC 2903

Oct 25, 2021 by Enrico de Lazaro

The NASA/ESA Hubble Space Telescope has produced an outstanding image of the central part of the isolated barred spiral galaxy NGC 2903. This Hubble image...

An illustration of Sciroseps pawhuskai. Image credit: Brian Engh.

Paleontologists Find Fossils of New Lizard and Fish Species in Arkansas

Oct 22, 2021 by News Staff

Two new species — the small skink Sciroseps pawhuskai and the pycnodontiform fish Anomoeodus caddoi — that lived during the Early Cretaceous...

Kuitems et al. provide evidence that the Norse were active on the North American continent in the year 1021 CE. Image credit: Oscar C.R.

New Research Provides Evidence that Vikings were Present in Newfoundland 1,000 Years Ago

Oct 22, 2021 by News Staff

The Vikings (or Norse) were the first Europeans to cross the Atlantic, confirms a new study published in the journal Nature. Kuitems et al. provide evidence...

Reconsturction of Mussaurus patagonicus herd. Image credit: Jorge Gonzalez.

Early Jurassic Herbivorous Dinosaurs Lived in Age-Segregated Herds

Oct 22, 2021 by News Staff

Paleontologists have analyzed an exceptional fossil assemblage from the Laguna Colorada Formation in Patagonia, Argentina, that includes 193-million-year-old...

Human-mediated selection for tusklessness in African savanna elephants (Loxodonta africana) during the Mozambican civil war appears to be driven by recent selection on at least one X-linked locus (AMELX) and one autosomal locus (MEP1a). Image credit: Benh Lieu Song / CC BY-SA 2.0.

Study: Intense Ivory Poaching Resulted in Rapid Evolution of Tusklessness in African Elephants

Oct 22, 2021 by News Staff

In response to heavy poaching by armed forces during the 20-year Mozambican civil war, populations of African savanna elephants (Loxodonta africana) in...

This artistic conception illustrates large asteroids penetrating Earth’s oxygen-poor atmosphere. Image credit: SwRI / Dan Durda / Simone Marchi.

Archean Asteroid Impacts Delayed Evolution of Earth’s Atmosphere, Study Suggests

Oct 21, 2021 by News Staff

A team of researchers from the United States and Austria has analyzed remnants of ancient asteroids and modeled the effects of their violent collisions...

Librado et al. pinpoint the Western Eurasian steppes, especially the lower Volga-Don region, as the homeland of modern domestic horses. Image credit: Devanath.

Horses Were First Domesticated in Western Eurasian Steppes More Than 4,000 Years Ago

Oct 21, 2021 by News Staff

In a study published this week in the journal Nature, scientists analyzed ancient horse genomes from all suspected domestication centers, including Iberia,...

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