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Centre national de la recherche scientifique (CNRS)


Results 101 - 120 of 477.


Astronomy & Space - 30.11.2022
Exceptionally luminous jets: when a star meets a black hole
Exceptionally luminous jets: when a star meets a black hole
For the first time in over a decade, scientists from the CNRS and the Institut de radioastronomie millimétrique 1 , together with international colleagues, have observed a tidal disruption event (TDE

Life Sciences - 23.11.2022
How can bats harbor so many viruses without developing symptoms?
Bats are asymptomatic carriers of a multitude of viruses that are pathogenic to most other mammals. How has their immune system evolved to shield them from these pathogens? A team of scientists-the majority affiliated with the CNRS, Claude Bernard Lyon 1 University, and ENS de Lyon 1 - has just published an article in Science Advances  addressing that question.

Environment - 22.11.2022
Bocage landscapes to promote plant diversity in cultivated fields
Bocage landscapes to promote plant diversity in cultivated fields
In bocage landscapes, the hedgerows that border cultivated fields provide many services. However, they are often perceived as sources of weeds, those wild plants generally called "weeds" and considered undesirable. Scientists from INRAE, in partnership with teams from the University of Rennes 1, CNRS and ANSES, studied the impacts of bocage landscapes on weeds.

Physics - 10.11.2022
Quantum sensors for GPS-free orientation
Quantum sensors for GPS-free orientation
How can we navigate airliners or allow military vehicles to stay on course without GPS or satellite signals? This is a problem for which quantum inertial sensors offer a solution. Harnessing quantum technology, they can take ultrasensitive measurements of acceleration in three dimensions, and in any orientation.

Environment - 09.11.2022
What causes cod stock collapse: climate-induced environmental change or fishing?
What causes cod stock collapse: climate-induced environmental change or fishing?
For the first time, a digital model has shown that both fishing and climate-induced environmental change are responsible for the collapse of cod stocks in the North Sea. Taking into consideration these two factors together is crucial for the sustainable management of fish stocks. Using a new digital model, an international team led by researchers from the oceanology and geosciences laboratory (LOG) (CNRS/Université de Lille/Université du Littoral Côte d'Opale) has shown how fishing and climate affect cod stocks in the North Sea.

Chemistry - Materials Science - 07.11.2022
A technology that 'sees' inside commercial batteries
A technology that ’sees’ inside commercial batteries
Controlling and studying the chemistry of batteries is crucial to improving their design. Scientists have developed an optical fibre based method for monitoring the evolving chemistry of a commercial battery in real time during charging and discharging. These results pave the way for easier and improved battery design.

Environment - 21.10.2022
Marine protected areas combat the effects of climate change
Marine protected areas combat the effects of climate change
Marine protected areas (MPAs) are one of the solutions being put forward to help adapt to and mitigate the effects of climate change. To demonstrate their effectiveness, scientists from CRIOBE (CNRS/École Pratique des Hautes Etudes/UPVD), as part of an international team 1 , analysed 22,403 research articles on MPAs.

Innovation - Life Sciences - 20.10.2022
How can flying insects and drones tell up from down?
How can flying insects and drones tell up from down?
A team of European researchers has established a new principle that explains how flying insects determine the direction of gravity, without using accelerometers. These results are an important step towards the creation of tiny autonomous drones. For proper operation, drones usually use accelerometers to determine the direction of gravity.

Astronomy & Space - History & Archeology - 20.10.2022
Discovery of extracts from a lost astronomical catalogue
Discovery of extracts from a lost astronomical catalogue
They prove that Hipparchus' data were significantly more accurate than those of another catalogue composed centuries later. Researchers from the CNRS, Sorbonne Université and Tyndale House (affiliated with the University of Cambridge) have recently found fragments of the Star Catalogue composed by the Greek astronomer Hipparchus during the 2nd century BC.

Life Sciences - Chemistry - 19.10.2022
How can digital data stored as DNA be manipulated?
Data can be encoded as DNA but are difficult to process thereafter. A new method enables operations to be performed on DNA-encoded data directly, without having to first translate them into their electronic equivalent. DNA can be used to reliably store a vast amount of digital data. However, retrieval or manipulation of specific data encoded in these molecules has hitherto been difficult.

Health - 14.10.2022
Testosterone is an ally of macrophages in the battle against adrenal cancers
Testosterone is an ally of macrophages in the battle against adrenal cancers
Why are cancers of the adrenal glands 1  more common among women? Why are prognoses worse for them? A team of scientists led by a CNRS researcher answers these questions in an article published on 14 October 2022 in Science Advances . They demonstrate that, in male mice, there is greater recruitment of immune cells known as macrophages, which can eliminate tumour cells.

Pharmacology - Health - 04.10.2022
Chemotherapy: towards a simplified subcutaneous administration
Chemotherapy: towards a simplified subcutaneous administration
The treatment of cancer is often based on intravenous chemotherapy, which is highly demanding and requires hospitalisation. One of the possibilities considered to alleviate this protocol is subcutaneous chemotherapy. Though much simpler to implement and more comfortable for the patient, it is impossible to practice as most of the active ingredients administered are irritant and vesicant - they stagnate in the subcutaneous tissue where they cause skin necrosis due to their high toxicity.

Environment - 19.09.2022
Climate change: a threat to urban trees
Climate change: a threat to urban trees
Trees play an essential role in the well-being of city dwellers - but for how long? An international research team, including a CNRS researcher from the Ecology and Dynamic of Anthropogenic Systems laboratory at the University of Picardy Jules Verne (Laboratoire Ecologie et dynamique des systèmes anthropisés, CNRS/Université of Picardy Jules Verne) 1 , has published the first global risk assessment for tree species planted in cities in the curre

Astronomy & Space - Physics - 12.09.2022
The James Webb telescope: first images of the Orion Nebula
The James Webb telescope: first images of the Orion Nebula
The James Webb telescope has delivered extraordinary new images of the Orion Nebula. Many stars are born in this nebula, hence these observations could yield information on the origins of our Solar system. The new images were obtained by a team headed by French and Canadian researchers. An international research team has released the first images of the Orion Nebula, the closest richly productive stellar nursery to our own solar system.

Astronomy & Space - Physics - 12.09.2022
James Webb Telescope: first images of the Orion Nebula
James Webb Telescope: first images of the Orion Nebula
The James Webb Telescope offers exceptional new images of the Orion Nebula. Many stars are born in this nebula, it could reveal information about the beginnings of our Solar System. These images were obtained by a team led by French and Canadian scientists. An international research team has just revealed the first images of the Orion Nebula, the richest and closest nursery of stars to the Solar System, captured by the James Webb Space Telescope.

Life Sciences - History & Archeology - 09.09.2022
The origins of donkey domestication
The origins of donkey domestication
The donkey has shaped the history of humankind, both as a source of power for farm work, and of transportation in sometimes hard to reach areas. To understand the history of the donkey's domestication, teams at the Centre for Anthropobiology and Genomics of Toulouse (CNRS/ Université Toulouse 3 Paul Sabatier) and scientists 1 from 37 laboratories around the world worked together to build and analyse the most complete panel of genomes ever studied for this animal.

Earth Sciences - Astronomy & Space - 25.08.2022
Planet Mars: Perseverance rover makes surprising geological discoveries in Jezero Crater
Planet Mars: Perseverance rover makes surprising geological discoveries in Jezero Crater
On February 21, 2021, NASA's Perseverance rover landed in the Jezero Crater on Mars. In October 1 , the rover confirmed the importance of its landing site, showing that Jezero Crater really was the site of a lake 3.6 billion years ago. Perseverance's geological discoveries in the crater's floor are described in four papers published on August 25, 2022 in Science and Science Advances .

Paleontology - Life Sciences - 24.08.2022
Sahelanthropus, the oldest representative of humanity, was indeed bipedal...but that's not all!
Sahelanthropus, the oldest representative of humanity, was indeed bipedal...but that’s not all!
The modalities and date of emergence of bipedalism remain bitterly debated, in particular because of a small number of very old human fossils. Sahelanthropus tchadensis , discovered in 2001 in Chad, is considered to be the oldest representative of the humankind. The shape of its cranium suggests a bipedal station.

Earth Sciences - Environment - 17.08.2022
Plate tectonics drives ocean oxygenation
Plate tectonics drives ocean oxygenation
Until now, it has been assumed that the oxygenation of the oceans over geological timescales has mainly been driven by atmospheric oxygen levels. However, a new study published in Nature June 27 2022   suggests otherwise. Work by scientists at the Biogeosciences Laboratory (CNRS/UBFC), together with their colleagues at the University of California's Department of Earth and Planetary Sciences, shows that the movement of tectonic plates has probably contributed to ocean oxygenation.

Life Sciences - Physics - 29.07.2022
Manipulating chromosomes in living cells reveals that they are fluid
Manipulating chromosomes in living cells reveals that they are fluid
Chromosomes are fluid - almost liquid - outside their division phases. This discovery was made possible thanks to the direct mechanical manipulation, for the very first time, of chromosomes in the nucleus of living cells. Until then, chromosomes - which are very long DNA molecules - were represented as being entangled like loose balls of yarn, and forming a sort of gel.