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Categories: Paleontology: General, Space: Cosmology

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Offbeat: General Offbeat: Space Space: Astronomy Space: Astrophysics Space: Cosmology Space: Exploration Space: General Space: Structures and Features
Published

Hubble unexpectedly finds double quasar in distant universe      (via sciencedaily.com)     Original source 

The early universe was a rambunctious place where galaxies often bumped into each other and even merged together. Using NASA's Hubble Space Telescope and other space and ground-based observatories, astronomers investigating these developments have made an unexpected and rare discovery: a pair of gravitationally bound quasars, both blazing away inside two merging galaxies. They existed when the universe was just 3 billion years old.

Geoscience: Environmental Issues Geoscience: Geography Geoscience: Oceanography Paleontology: Climate Paleontology: General
Published

Ice sheets can collapse faster than previously thought possible      (via sciencedaily.com)     Original source 

Ice sheets can retreat up to 600 meters a day during periods of climate warming, 20 times faster than the highest rate of retreat previously measured. An international team of researchers used high-resolution imagery of the seafloor to reveal just how quickly a former ice sheet that extended from Norway retreated at the end of the last Ice Age, about 20,000 years ago.

Offbeat: General Offbeat: Space Space: Astronomy Space: Astrophysics Space: Cosmology Space: Exploration Space: General
Published

A new measurement could change our understanding of the Universe      (via sciencedaily.com) 

When it comes to measuring how fast the Universe is expanding, the result depends on which side of the Universe you start from. A recent study has calibrated the best cosmic yardsticks to unprecedented accuracy, shedding new light on what's known as the Hubble tension.

Biology: Zoology Ecology: Extinction Ecology: Nature Paleontology: Dinosaurs Paleontology: Early Mammals and Birds Paleontology: General
Published

Analysis of dinosaur eggshells: Bird-like Troodon laid 4 to 6 eggs in a communal nest      (via sciencedaily.com) 

An international research team has determined that Troodon, a dinosaur very close to modern birds, was a warm-blooded animal (an endotherm), but had a reproductive system similar to that of modern reptiles. The scientists applied a new method which allowed for accurate determination of the temperature when the egg's carbonate shell was formed. Furthermore, the researchers showed that Troodon laid 4 to 6 eggs per clutch. As nests with up to 24 Troodon eggs had been found, the scientists conclude that several Troodon females laid their eggs in communal nests.

Offbeat: General Offbeat: Space Space: Astronomy Space: Astrophysics Space: Cosmology Space: Exploration Space: General Space: Structures and Features
Published

Galaxy clusters yield new evidence for standard model of cosmology      (via sciencedaily.com)     Original source 

A new study probing the structure and evolution of galaxy clusters shows good agreement with the predictions of standard cosmological models.

Offbeat: General Offbeat: Space Space: Astronomy Space: Astrophysics Space: Cosmology Space: Exploration Space: General Space: Structures and Features
Published

Scientists observe flattest explosion ever seen in space      (via sciencedaily.com)     Original source 

Astronomers have observed an explosion 180 million light years away which challenges our current understanding of explosions in space, that appeared much flatter than ever thought possible.

Biology: General Biology: Zoology Ecology: Extinction Offbeat: General Offbeat: Paleontology and Archeology Offbeat: Plants and Animals Paleontology: Dinosaurs Paleontology: Early Mammals and Birds Paleontology: General
Published

Predatory dinosaurs such as T. rex sported lizard-like lips      (via sciencedaily.com) 

A new study suggests that predatory dinosaurs, such as Tyrannosaurus rex, did not have permanently exposed teeth as depicted in films such as Jurassic Park, but instead had scaly, lizard-like lips covering and sealing their mouths.

Space: Astrophysics Space: Cosmology Space: General Space: Structures and Features
Published

'Taffy galaxies' collide, leave behind bridge of star-forming material      (via sciencedaily.com)     Original source 

The Gemini North telescope, one half of the International Gemini Observatory, operated by NSF's NOIRLab, captured a dazzling image of UGC 12914 and UGC 12915, which are nicknamed the Taffy Galaxies. Their twisted shape is the result of a head-on collision that occurred about 25 million years prior to their appearance in the image. A bridge of highly turbulent gas devoid of significant star formation spans the gap between the two galaxies.

Offbeat: General Offbeat: Space Space: Astronomy Space: Astrophysics Space: Cosmology Space: Exploration Space: General Space: Structures and Features
Published

Astronomers witness the birth of a very distant cluster of galaxies from the early Universe      (via sciencedaily.com)     Original source 

Astronomers have discovered a large reservoir of hot gas in the still-forming galaxy cluster around the Spiderweb galaxy -- the most distant detection of such hot gas yet. Galaxy clusters are some of the largest objects known in the Universe and this result further reveals just how early these structures begin to form.

Space: Astrophysics Space: Cosmology Space: Exploration Space: General Space: Structures and Features
Published

How cosmic winds transform galactic environments      (via sciencedaily.com)     Original source 

Much like how wind plays a key role in life on Earth by sweeping seeds, pollen and more from one place to another, galactic winds -- high-powered streams of charged particles and gases -- can change the chemical make-up of the host galaxies they form in, simply by blowing in a specific direction.

Anthropology: General Environmental: General Geoscience: Earth Science Geoscience: Environmental Issues Paleontology: Climate Paleontology: General
Published

A reconstruction of prehistoric temperatures for some of the oldest archaeological sites in North America      (via sciencedaily.com) 

Scientists often look to the past for clues about how Earth's landscapes might shift under a changing climate, and for insight into the migrations of human communities through time. A new study offers both by providing, for the first time, a reconstruction of prehistoric temperatures for some of the first known North American settlements.

Offbeat: General Offbeat: Space Space: Astronomy Space: Astrophysics Space: Cosmology Space: Exploration Space: General Space: Structures and Features
Published

Brightest gamma-ray burst ever observed reveals new mysteries of cosmic explosions      (via sciencedaily.com) 

Scientists believe the gamma-ray emission, which lasted over 300 seconds, is the birth cry of a black hole, formed as the core of a massive and rapidly spinning star collapses under its own weight.

Biology: Biochemistry Biology: Evolutionary Biology: General Ecology: Extinction Ecology: Nature Paleontology: General
Published

Extinction of steam locomotives derails assumptions about biological evolution      (via sciencedaily.com) 

When the Kinks' Ray Davies penned the tune 'Last of the Steam-Powered Trains,' the vanishing locomotives stood as nostalgic symbols of a simpler English life. But for a paleontologist, the replacement of steam-powered trains with diesel and electric engines, as well as cars and trucks, might be a model of how some species in the fossil record died out.

Offbeat: General Offbeat: Space Space: Astronomy Space: Astrophysics Space: Cosmology Space: General Space: Structures and Features
Published

Artificial intelligence discovers secret equation for 'weighing' galaxy clusters      (via sciencedaily.com) 

Astrophysicists have leveraged artificial intelligence to uncover a better way to estimate the mass of colossal clusters of galaxies. The AI discovered that by just adding a simple term to an existing equation, scientists can produce far better mass estimates than they previously had. The improved estimates will enable scientists to calculate the fundamental properties of the universe more accurately, the astrophysicists have reported.

Chemistry: Inorganic Chemistry Physics: General Space: Astronomy Space: Astrophysics Space: Cosmology Space: Exploration Space: General Space: Structures and Features Space: The Solar System
Published

AI finds the first stars were not alone      (via sciencedaily.com) 

Machine learning and state-of-the-art supernova nucleosynthesis has helped researchers find that the majority of observed second-generation stars in the universe were enriched by multiple supernovae.

Archaeology: General Geoscience: Geography Paleontology: General
Published

Copper artifacts unearth new cultural connections in southern Africa      (via sciencedaily.com) 

Chemical and isotopic analysis of artifacts from southern Africa called copper ingots reveals new cultural connections among people living in the region between the 5th and 20th centuries.

Energy: Nuclear Physics: General Physics: Quantum Physics Space: Astronomy Space: Astrophysics Space: Cosmology Space: Exploration Space: General Space: Structures and Features
Published

Neutrinos made by a particle collider detected      (via sciencedaily.com) 

Physicists have detected neutrinos created by a particle collider. The discovery promises to deepen scientists' understanding of the subatomic particles, which were first spotted in 1956 and play a key role in the process that makes stars burn.

Biology: Biochemistry Biology: General Paleontology: Early Mammals and Birds Paleontology: General
Published

How the 'marsupial sabertooth' thylacosmilus saw its world      (via sciencedaily.com) 

A new study investigates how an extinct, carnivorous marsupial relative with canines so large they extended across the top of its skull could hunt effectively despite having wide-set eyes, like a cow or a horse. The skulls of carnivores typically have forward-facing eye sockets, or orbits, which helps enable stereoscopic (3D) vision, a useful adaptation for judging the position of prey before pouncing. Scientists studied whether the 'marsupial sabertooth' Thylacosmilus atrox could see in 3D at all.