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Categories: Biology: Marine, Space: Exploration

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Biology: Biochemistry Biology: Cell Biology Biology: General Biology: Marine Biology: Zoology Ecology: Research Ecology: Sea Life
Published

Consistent metabolism may prove costly for insects in saltier water      (via sciencedaily.com)     Original source 

Increased salinity usually spells trouble for freshwater insects like mayflies. A new study finds that the lack of metabolic responses to salinity may explain why some freshwater insects often struggle in higher salinity, while other freshwater invertebrates (like mollusks and crustaceans) thrive. 

Offbeat: General Offbeat: Space Space: Astronomy Space: Exploration Space: General Space: The Solar System
Published

Large mound structures on Kuiper belt object Arrokoth may have common origin      (via sciencedaily.com)     Original source 

A new study posits that the large, approximately 5-kilometer-long mounds that dominate the appearance of the larger lobe of the pristine Kuiper Belt object Arrokoth are similar enough to suggest a common origin. The study suggests that these “building blocks” could guide further work on planetesimal formational models.

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

Study quantifies satellite brightness, challenges ground-based astronomy      (via sciencedaily.com)     Original source 

The ability to have access to the Internet or use a mobile phone anywhere in the world is taken more and more for granted, but the brightness of Internet and telecommunications satellites that enable global communications networks could pose problems for ground-based astronomy. Scientists confirm that recently deployed satellites are as bright as stars seen by the unaided eye.

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

Bursts of star formation explain mysterious brightness at cosmic dawn      (via sciencedaily.com)     Original source 

In the James Webb Space Telescope’s (JWST) first images of the universe’s earliest galaxies, the young galaxies appear too bright, too massive and too mature to have formed so soon after the Big Bang. Using new simulations, a team of astrophysicists now has discovered that these galaxies likely are not so massive after all. Although a galaxy’s brightness is typically determined by its mass, the new findings suggest that less massive galaxies can glow just as brightly from irregular, brilliant bursts of star formation.

Anthropology: General Biology: Biochemistry Biology: Biotechnology Biology: Cell Biology Biology: General Biology: Genetics Biology: Marine Biology: Zoology Ecology: Extinction Ecology: Sea Life
Published

DNA from discarded whale bones suggests loss of genetic diversity due to commercial whaling      (via sciencedaily.com)     Original source 

Commercial whaling in the 20th century decimated populations of large whales but also appears to have had a lasting impact on the genetic diversity of today’s surviving whales, new research shows.

Biology: Marine Ecology: Sea Life Environmental: General Geoscience: Environmental Issues Geoscience: Geography Geoscience: Oceanography
Published

Sustainable protection of rapidly subsiding coastlines with mangroves      (via sciencedaily.com)     Original source 

Along the Asian coast lines there are many areas where rural communities experience alarming rates of sea level rises due to land subsidence up to 10 cm per year. This causes tremendous challenges on how to live there and protect these coasts. Scientists have now investigated the potential and limitation of mangrove restoration as a cost-effective and sustainable solution for coastal protection in rapidly subsiding areas.

Biology: Biochemistry Biology: Cell Biology Biology: Developmental Biology: Evolutionary Biology: General Biology: Marine Biology: Microbiology Ecology: Sea Life
Published

Did animal evolution begin with a predatory lifestyle?      (via sciencedaily.com)     Original source 

Surprising findings on the development of sea anemones suggest that a predatory lifestyle molded their evolution and had a significant impact on the origin of their nervous system. The researchers were able to show that the young life stages (larvae) of the small sea anemone Aiptasia actively feed on living prey and are not dependent on algae. To capture its prey, the anemone larvae use specialized stinging cells and a simple neuronal network.

Biology: Biochemistry Biology: General Biology: Marine Biology: Zoology Ecology: Animals Ecology: Endangered Species Ecology: Extinction Ecology: Sea Life Offbeat: Earth and Climate Offbeat: General Offbeat: Plants and Animals
Published

Why are killer whales harassing and killing porpoises without eating them?      (via sciencedaily.com)     Original source 

For decades, fish-eating killer whales in the Pacific Northwest have been observed harassing and even killing porpoises without consuming them —- a perplexing behavior that has long intrigued scientists.

Space: Astronomy Space: Exploration Space: General
Published

Ethical guidelines needed before human research in commercial spaceflight is ready for liftoff      (via sciencedaily.com)     Original source 

Before human research is conducted during commercial spaceflights, it should be 'ethically cleared to launch,' according to a global team of scientists, health policy experts and commercial spaceflight professionals.

Biology: Biochemistry Biology: General Biology: Marine Ecology: Sea Life Offbeat: Earth and Climate Offbeat: General Offbeat: Plants and Animals
Published

Whales Around the World Play With Kelp Clumps      (via sciencedaily.com)     Original source 

A new article has analyzed another understudied behavior in baleen (filter-feeding) whales such as humpback whales in different populations across the northern and southern hemispheres. They appeared to roll around and 'play' with clumps of kelp and seaweed at the water's surface. The research also emphasizes that the behavior was similar in different individuals, regardless of where in the world it occurred.

Biology: Biochemistry Biology: Biotechnology Biology: Cell Biology Biology: General Biology: Marine Ecology: Extinction Ecology: Nature Ecology: Sea Life Environmental: Ecosystems Environmental: General Geoscience: Environmental Issues Geoscience: Geography Geoscience: Oceanography
Published

Atlantic walrus more vulnerable than ever to Arctic warming      (via sciencedaily.com)     Original source 

Past cycles of climate change, along with human exploitation, have led to only small and isolated stocks of Atlantic walrus remaining. The current population is at high risk of the same issues affecting them severely, according to a new study.

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

Extreme weight loss: Star sheds unexpected amounts of mass just before going supernova      (via sciencedaily.com)     Original source 

A newly discovered nearby supernova whose star ejected up to a full solar mass of material in the year prior to its explosion is challenging the standard theory of stellar evolution. The new observations are giving astronomers new insight into what happens in the final year prior to a star's death and explosion.

Chemistry: Biochemistry Physics: Optics Space: Astronomy Space: Astrophysics Space: Exploration Space: General Space: Structures and Features
Published

New proof for black hole spin      (via sciencedaily.com)     Original source 

The supermassive black hole at the heart of galaxy M87, made famous by the first picture of a black hole shadow, has yielded another first: the jet shooting out from the black hole has been confirmed to wobble, providing direct proof that the black hole is spinning.

Offbeat: General Offbeat: Space Space: Astronomy Space: Astrophysics Space: Exploration Space: General Space: Structures and Features Space: The Solar System
Published

New insights into the atmosphere and star of an exoplanet      (via sciencedaily.com) 

A new study of the intriguing TRAPPIST-1 exoplanetary system has demonstrated the complex interaction between the activity of the system's star and its planetary features.

Biology: Biochemistry Biology: Cell Biology Biology: General Biology: Genetics Biology: Molecular Space: Exploration Space: General Space: The Solar System
Published

Did life exist on Mars? Other planets? With AI's help, we may know soon      (via sciencedaily.com)     Original source 

Scientists have discovered a simple and reliable test for signs of past or present life on other planets -- 'the holy grail of astrobiology.' Researchers report that, with 90% accuracy, their artificial intelligence-based method distinguished modern and ancient biological samples from those of abiotic origin.

Biology: Biochemistry Biology: General Biology: Marine Ecology: General Ecology: Nature Ecology: Research Ecology: Sea Life Environmental: Ecosystems Environmental: Water
Published

Theories about the natural world may need to change to reflect human impact      (via sciencedaily.com) 

New research has validated at scale, one of the theories that has underpinned ecology for over half a century. In doing so, the findings raise further questions about whether models should be revised to capture human impacts on natural systems.

Biology: Marine Ecology: Sea Life Environmental: General Environmental: Water Geoscience: Environmental Issues Geoscience: Geography
Published

Rivers contain hidden sinks and sources of microplastics      (via sciencedaily.com)     Original source 

New research represents the first combined analysis of microplastics in water, sediment and air around a major river system. It found significant quantities of microplastics trapped in riverbed sediments, and also found they were being transported through the air and the flow of the river.