lundi 22 juillet 2024

SCIENCES ENERGIES ENVIRONNEMENT

 

Dear olivier hartmanshenn,

Here is your customized Science X Newsletter for week 29:

NASA's Curiosity rover discovers a surprise in a Martian rock

Scientists were stunned on May 30 when a rock that NASA's Curiosity Mars rover drove over cracked open to reveal something never seen before on the Red Planet: yellow sulfur crystals.

As alpine glaciers melt, the corpses of long-lost climbers are being discovered in the ice

In late June, as a group of mountaineers descended a treacherous glacier high in the Peruvian Andes, they spotted a dark, out-of-place lump resting on the blinding white snow.

Astronomers discover what may be 21 neutron stars orbiting sun-like stars

Most stars in our universe come in pairs. While our own sun is a loner, many stars like our sun orbit similar stars, while a host of other exotic pairings between stars and cosmic orbs pepper the universe. Black holes, for example, are often found orbiting each other. One pairing that has proven to be quite rare is that between a sun-like star and a type of dead star called a neutron star.

Quantum microscopy study makes electrons visible in slow motion

Physicists at the University of Stuttgart under the leadership of Prof. Sebastian Loth are developing quantum microscopy which enables them for the first time to record the movement of electrons at the atomic level with both extremely high spatial and temporal resolution.

Results from Juukan Gorge show 47,000 years of Aboriginal heritage was destroyed in mining blast

In May 2020, as part of a legally permitted expansion of an iron ore mine, Rio Tinto destroyed an ancient rockshelter at Juukan Gorge in Puutu Kunti Kurrama Country in the Pilbara region of Western Australia.

Sea ice's cooling power is waning faster than its area of extent, new study finds

As sea ice disappears and grows less reflective, the Arctic has lost around a quarter of its cooling power since 1980, and the world has lost up to 15%, according to new research led by University of Michigan scientists.

Zooplankton study challenges traditional views of evolution

In new research, Arizona State University scientists and their colleagues investigated genetic changes occurring in a naturally isolated population of the water flea, Daphnia pulex. This tiny crustacean, barely visible to the naked eye, plays a crucial role in freshwater ecosystems and offers a unique window into natural selection and evolution.

A new explanation for Jupiter's shrinking Great Red Spot

Jupiter's Great Red Spot—the biggest windstorm in the solar system—is shrinking, and a new study may help explain why.

Another intermediate-mass black hole discovery at the center of our galaxy

While researching a cluster of stars in the immediate vicinity of the supermassive black hole SgrA* (Sagittarius A*) at the center of our galaxy, an international team of researchers led by PD Dr. Florian Peißker has found signs of another, intermediate-mass black hole.

In raging summer, sunscreen misinformation scorches US

Dismissively tossing a tube of sunscreen over his shoulder, a bare-chested TikTok influencer declares that the cream causes cancer. He instead promotes "regular sun exposure" to his 400,000 followers—contradicting US dermatologists fighting a surge in such dubious misinformation.

Minneapolis is on the leading edge of biochar, a carbon sequestering material full of promise and still under research

Minneapolis is on track to become one of the first U.S. cities to invest in biochar, a multifunctional, charcoal-like material said to help grow bigger plants, reduce storm water runoff and remove carbon from the atmosphere.

World's rarest whale may have washed up on New Zealand beach, possibly shedding clues on species

Spade-toothed whales are the world's rarest, with no live sightings ever recorded. No one knows how many there are, what they eat, or even where they live in the vast expanse of the southern Pacific Ocean. However, scientists in New Zealand may have finally caught a break.

Researchers achieve unprecedented nanostructuring inside silicon

Silicon, the cornerstone of modern electronics, photovoltaics, and photonics, has traditionally been limited to surface-level nanofabrication due to the challenges posed by existing lithographic techniques. Available methods either fail to penetrate the wafer surface without causing alterations or are limited by the micron-scale resolution of laser lithography within Si.

Pompeii skeleton discovery shows another natural disaster may have made Vesuvius eruption even more deadly

Almost 2,000 years ago, Pliny the Younger wrote letters describing the shaking ground as Vesuvius erupted. Now, a collaborative study led by researchers from the Istituto Nazionale di Geofisica e Vulcanologia (INGV) and Pompeii Archaeological Park has shed light on the effects of seismicity associated with the 79 CE eruption.

How climate change is altering the Earth's rotation

For the first time, researchers at ETH Zurich have been able to fully explain the various causes of long-term polar motion in the most comprehensive modeling to date, using AI methods. Their model and their observations show that climate change and global warming will have a greater influence on the Earth's rotational speed than the effect of the moon, which has determined the increase in the length of the day for billions of years.

Diatom surprise could rewrite the global carbon cycle

When it comes to diatoms that live in the ocean, new research suggests that photosynthesis is not the only strategy for accumulating carbon. Instead, these single-celled plankton are also building biomass by feeding directly on organic carbon in wide swaths of the ocean.

Genome study informs restoration of American chestnut tree

Native trees adapt to the climate and environmental conditions of their area to survive. Researchers in the College of Natural Resources and Environment in collaboration with the American Chestnut Foundation confirmed this by examining the genome of American chestnut trees sampled throughout the Appalachian Mountain range and grouping the samples according to their specific environmental region.

Researchers directly simulate the fusion of oxygen and carbon nuclei

The fusion of two nuclei is a complex process influenced by many factors. These factors include not only the relative energy and angular momentum of the two nuclei, but also how their structures evolve as they collide. The outcome of the collisions is dramatically impacted by the quantum nature of the nuclei. The best way to handle the underlying complexities is to directly simulate how the nuclei evolve as they collide, though this constitutes a massive computational effort.

Boeing is closer to understanding thruster failures on its first astronaut flight with latest test

Boeing is closer to understanding what went wrong with its astronaut capsule in orbit, now that testing is complete on a spare thruster here on Earth.

The salmon diaries: Life before and after Klamath Dam removal

When salmon return from the ocean to the Klamath River after the world's largest dam removal project ends this fall, they will regain access to 400 miles of historical spawning habitat their species has been cut off from for more than a century.




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