Science

Solar flare, rhino survival and vaccination rate: science news in ultra-brief

The science news of April 28, 2021 is:

In space: record solar flare on Proxima du Centaure.

  • The star closest to our solar system experienced in 2019 a solar flare 100 times stronger than that of our Sun.
  • Five telescopes recorded the phenomenon in a wide range of wavelengths.
  • This observation raises the question of the possibility of life on the planet Proxima Centauri b, which is in the star’s theoretical habitability zone …

In animals: researchers announce good news for the survival of Sumatran rhinos.

  • By analyzing the DNA of Sumatran rhinos, an international team of researchers has made a rather reassuring discovery for the survival of the species.
  • The last populations of Sumatran rhinoceros (Dicerorhinus sumatrensis) suffer only from a low level of inbreeding.
  • Good news knowing that the species is critically endangered, it is one of the most endangered mammal species in the world.

In health: IN CURVES. Covid-19: vaccination rates by region as of April 28, 2021.

  • The vaccination campaign against Covid-19 in France began on December 26, 2020.
  • In order to closely follow the vaccination campaign against Covid-19 in France, Science and the Future takes stock, every week, of the vaccination rate in all regions of the country.
  • As of Monday April 26: the vaccination campaign is accelerating for the second dose and some regions already exceed 10% of their fully vaccinated population, in particular Corsica (14%), PACA and Bourgogne-Franche-Comté.

In kind: the evolution of the human footprint on biodiversity in maps.

  • A couple of American scientists have developed a map to observe the evolution of the human footprint on landscapes.
  • It is a cartographic process allowing each country to follow its progress in terms of ecosystem preservation and biodiversity conservation.
  • This tool can be updated regularly, using only satellite images and based on machine learning.

Healthy: beware of the promises of fruit juice or iced tea, according to a consumer association.

  • The association for the defense of consumers CLCV invites you to be wary of the promises of fruit juices, smoothies or iced teas.
  • Better framing of nutritional claims and other positive mentions on these liquids are sometimes false friends.
  • Many of these drinks have a poor nutritional profile, especially because they are very sweet.

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