Covid-19, space and dust clouds: Science News

Scientific news of 16 March 2022 is:

Healthy: We know why coronavirus does not spread through surfaces.

  • A protein in the spitting droplet acts to engulf Sars-CoV-2 and prevent it from entering our cells.

  • Despite resistance for about 28 days, no cases of infection have been found where the only possible route of transmission would have been a contaminated surface.

  • This protein, mucin, is produced by our mucous membranes and its main role will be to keep these areas of our body moist.


In Space: Space, the Collateral Victim of the Ukrainian Crisis.

  • Roscosmos, the Russian space agency, is retaliating in response to financial and technical sanctions imposed by the European Union and the United States.

  • If the ISS were deprived of the thrust provided by Russian Progress cargo ships and the Russian section of the ISS, it would eventually enter the atmosphere uncontrollably.

  • Without the Soyuz in Kourou, more than a dozen non-Russian space missions are on the ground today.


In Kind: An orange sky and dust from the Sahara in part of France.

  • The event, called “Calima”, which affects France, should last until Thursday.

  • Hurricanes in the Sahara Desert create strong winds on the surface of the land, which lift sand and dust particles.

  • The difference in temperature between the warm air above and the ground causes the smallest particles to remain in the air, which cools, while the heavier particles fall back.


In animals: the launch of a national plan against invasive alien species.

  • The Secretary of State for Biodiversity, Berangare Abba, presented a national plan to combat invasive alien species on Tuesday, March 15, 2022.

  • These animal and plant species, which are introduced by humans outside their normal environments, threaten biodiversity, can carry pathogens and are difficult to eradicate once established.

  • Government planning relies on “prevention and upstream action” by strengthening control as well as raising awareness among individuals and structures.


In Kind: 30 Years of Natura 2000: A Study Creates a Mixed Evaluation of the System’s Effectiveness

  • Until now, questions of the effectiveness of the Natura 2000 fields – a European Union system – on biodiversity were not assessed in its entirety, but only on local scales.
  • The low level of coverage in the Atlantic and continental domains is a constraint in the hope that the Natura 2000 network will significantly impact the conservation status of the habitats and species of these biogeographic regions.
  • Natura 2000 can’t do much more than slow down the degradation.
See also  COVID-19. According to a British study, it is possible to transmit the virus to your cat.

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