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Human Embryos Have ‘Lizard-Like’ Limb Muscles: Study

Dorsal view of the left hand of a 10-week old human embryo. The dorsometacarpales are highlighted: these muscles are present in adults of many other limbed animals, while in humans they normally disappear or become fused with other muscles before birth. Image credit: Diogo et al, doi: 10.1242/dev.180349.
Oct 2, 2019 by News Staff

A new study, published in the journal Development, has confirmed the transient presence of atavistic muscles — present in our ancestors, but normally absent from the adult human — during normal embryonic human development, and reveals the existence of others not previously described in human embryos. Some of these muscles, such as the dorsometacarpales, disappeared from our ancestors more than 250 million years ago, during the transition...

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The Hall’s New Guinea crocodile (Crocodylus halli) at St. Augustine Alligator Farm Zoological Park. Image credit: Murray et al, doi: 10.1643/CG-19-240.

New Freshwater Crocodile Species Found in New Guinea

Oct 1, 2019 by News Staff

Scientists had known that New Guinea was home to a unique species of crocodile since the New Guinea crocodile (Crocodylus novaeguineae) was officially...

The z66OD protocluster: the blue shading shows the calculated extent of the protocluster, and the bluer color indicates higher density of galaxies in the protocluster; the red objects in zoom-in figures are the 12 galaxies found in it. Image credit: NAOJ / Harikane et al.

13-Billion-Year-Old Galaxy Protocluster Found

Oct 1, 2019 by News Staff

Using the Subaru, Keck, and Gemini telescopes, astronomers have discovered a young cluster of galaxies in the early Universe. Named z66OD, the protocluster...

Interstellar Comet 2I/Borisov Probably Came from Double Red Dwarf Kruger 60

Sep 30, 2019 by Sergio Prostak

A new study by astronomers from the A. Mickiewicz University and the Space Research Centre of the Polish Academy of Sciences suggests that the interstellar...

This composite image, obtained by the Gemini North Multi-Object Spectrograph on the 8.2-m Gemini North telescope, shows the interstellar comet C/2019 Q4. Image credit: Gemini Observatory / NSF / AURA / Travis Rector.

Astronomers Detect Cyanide Gas in Interstellar Comet 2I/Borisov

Sep 28, 2019 by Sergio Prostak

Astronomers have for the first time detected cyanide (CN) gas — a common ingredient of solar system comets — in the coma of an interstellar...

When a star strays too close to a black hole, intense tides break it apart into a stream of gas. The tail of the stream escapes the system, while the rest of it swings back around, surrounding the black hole with a disk of debris. Image credit: NASA’s Goddard Space Flight Center.

TESS Spots Its First Tidal Disruption Event

Sep 27, 2019 by News Staff

NASA’s Transiting Exoplanet Survey Satellite (TESS) gave astronomers an unexpected glimpse at a black hole violently ripping apart a Sun-sized star....

Denisova Cave in the Altai Mountains of southern Siberia. Image credit: Alex Demin / CC BY-SA 4.0.

New Research Sheds Light on Everyday Life in Denisova Cave

Sep 27, 2019 by News Staff

At least three hominins (Denisovans, Neanderthals, and early Homo sapiens) and large cave-dwelling carnivores (hyena, wolves, and even bears) used Denisova...

An artist’s impression of a blazar. Image credit: DESY / Science Communication Lab.

Do Gamma-Ray Jets Really Achieve Superluminal Speeds?

Sep 26, 2019 by News Staff

High-speed particle jets from gamma-ray bursts may exceed the speed of light in surrounding gas clouds, but do so without violating Einstein’s theory...

Reconstruction of the Trypillian giant-settlement Maidanetske, Ukraine. Image credit: Kenny Arne Lang Antonsen / CC BY-SA 4.0.

Mega-Structures of Ukraine’s Trypillia Culture Served as Community Centers

Sep 26, 2019 by News Staff

Mega-structures of the Trypillia culture, which was part of the larger Cucuteni-Trypillia culture, were public buildings that served a variety of economic...

Broken and rounded dodecahedral diamond from the Koffiefontein kimberlite pipe that hosted goldschmidtite; the mineral is seen in green and radiation damage of the diamond can be seen in the brown regions. Image credit: Meyer et al, doi: 10.2138/am-2019-6937.

Goldschmidtite: New Mineral from Earth’s Mantle Found inside Diamond

Sep 24, 2019 by Natali Anderson

A team of geologists from the University of Alberta, Northwestern University and the University of Glasgow has found a previously unknown mineral in a...

Pet cats show a similar capacity for the formation of secure and insecure attachments towards human caregivers previously demonstrated in children and dogs. Image credit: Pexels.

Pet Cats Really Bond with Their Owners, Says New Study

Sep 24, 2019 by News Staff

Domestic cats (Felis silvestris catus) form attachments with their owners that are similar to the bonds formed by children and dogs with their caretakers,...

An artist’s reconstruction of two rauisuchians fighting over a desiccated corpse of a mammal-relative in the Triassic of southern Africa. In the background, dinosaurs and mammal-like reptiles form other parts of the ecosystem. Image credit: Viktor Radermacher.

Triassic Crocodile Cousins Preyed on Plant-Eating Dinosaurs

Sep 24, 2019 by News Staff

Rauisuchians — predatory crocodile-like creatures that lived during the Triassic period, some 210 million years ago — preyed on early herbivorous...

This image from ESA’s Mars Express shows a beautiful slice of the Red Planet from the northern polar cap downwards, and highlights cratered, pockmarked swathes of the Terra Sabaea and Arabia Terra regions. It comprises data gathered on June 17, 2019. This image was created using data from the nadir and color channels of Mars Express’ High Resolution Stereo Camera. The nadir channel is aligned perpendicular to the surface of Mars, as if looking straight down at the surface. North is up. Image credit: ESA / DLR / FU Berlin.

ESA Releases Mesmerizing New Image of Mars

Sep 23, 2019 by News Staff

The High Resolution Stereo Camera onboard ESA’s Mars Express orbiter captured this detailed image of the Red Planet on June 17, 2019. This image from...

For DNA to be read, replicated or repaired, DNA molecules must open themselves. This happens when the cells use a catalytic protein to create a hydrophobic environment around the molecule. Image credit: Yen Strandqvist / Chalmers University of Technology.

Scientists Disprove Popular Theory of How DNA Binds Itself

Sep 23, 2019 by News Staff

DNA is constructed of two strands, consisting of sugar molecules and phosphate groups. Between these two strands are nitrogen bases, the compounds which...

Emperor penguins (Aptenodytes forsteri). Image credit: Michael Van Woert / NOAA NESDIS / ORA.

Researchers Sequence Genomes of All Living Penguin Species

Sep 20, 2019 by News Staff

Scientists from the Penguin Genome Consortium have produced 19 high-coverage penguin genome sequences that, together with two previously published genomes,...

A portrait of a juvenile female Denisovan based on a skeletal profile reconstructed from ancient DNA methylation maps. Image credit: Maayan Harel.

Scientists Reconstruct Skeletal Anatomy of Denisovans

Sep 19, 2019 by News Staff

A team of researchers from Israel and Spain has produced reconstructions of Denisovans, an extinct sister group of Neanderthals, based on patterns of methylation...

The structure of the Eustachian tube in a Neanderthal man. Image credit: SUNY Downstate Health Sciences University.

Chronic Ear Infections Contributed to Neanderthal Extinction

Sep 19, 2019 by News Staff

Neanderthals may have been doomed to extinction because they had persistent, life-long ear infections due to the structure of their Eustachian tubes, a...

Schmitz et al argue that the mid-Ordovician ice age was caused by global cooling, triggered by extra dust in the atmosphere of Earth from the breakup of a giant asteroid in the main asteroid belt. Image credit: NASA / JPL-Caltech.

Dust from Disintegrated Asteroid Triggered Mid-Ordovician Ice Age

Sep 19, 2019 by News Staff

There’s always a lot of extraterrestrial dust floating down to Earth, but this dust is normally only a tiny fraction of the other dust in our atmosphere...

NASA’s Cassini spacecraft in orbit around Saturn. Image credit: NASA / JPL-Caltech.

Saturn’s Rings are as Old as Solar System Itself, Study Suggests

Sep 18, 2019 by News Staff

The famous ring system of Saturn may be much older than some planetary scientists think, according to a new study published in the journal Nature Astronomy. NASA’s...

Artist’s illustration showing a massive exoplanet falling into its host star -- one of the possible explanations for the strange dimming of KIC 8462852. Image credit: NASA / ESA / Alfred Vidal-Madjar, Institut d’Astrophysique de Paris, CNRS.

Melting Exomoon May Explain Long-Term Dimming of Milky Way’s ‘Most-Mysterious Star’

Sep 18, 2019 by News Staff

A team of astrophysicists from Columbia University proposes that the strange long-term dimming of the KIC 8462852 star (also known as Tabby’s star or...

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