Can an organ from a donor who has had Covid-19 be transplanted without risk?

During the pandemic, organ donors who recently tested positive for Covid-19 were not prioritized in transplant programs. The shortage of organs coupled with the growing demand for transplants forces a change of strategy. Is this a good or a bad idea? In the United States, a retrospective study observational team assessed the safety of transplants … Read more

New emerging professions for the decade

There is no doubt that the Covid-19 crisis has dealt a hell of a blow to the sacrosanct world of work and has only accelerated a change that was already in the air. Every medal has its downside, the positive aspect is to see the emergence of other ways of conceiving professional activity, greatly driven … Read more

Extraordinary weather phenomenon: polar stratospheric clouds

In the most northerly regions of the world, beautiful pearly-colored clouds are seen in winter on rare occasions. These are polar stratospheric clouds, a weather phenomenon as beautiful as it is polluting! Also called pearly clouds, polar stratospheric clouds (PSC) are identifiable by their appearance as pastel-colored, iridescent waves. As their name suggests, these clouds … Read more

We detail the colors and tails of comet ZTF which is visible to the naked eye

It’s happening right now: a comet is visible to the naked eye, and it will be closest to Earth in a few days, the 1er february ! Baptized C/2022 E3 (ZTF) and more commonly nicknamed ZTF, it has many interesting characteristics to detail. On March 2, 2022, astronomersastronomers observe using the Zwicky Transient Facility an … Read more

A reverse stunt filmed in the United States

One dronedrone filmed a waterfall with completely reversed waters due to the windswinds powerful blowing that day in Utah. Located about 80 kilometers from Zion National Park, the Kayenta area has been copiously wet and snowy in recent weeks, like all of the American West, due to multiple atmospheric rivers. The waterfalls are therefore loaded … Read more

How the Earth regulates its temperature

One of the specificities of the EarthEarth is to have a mechanism of resilienceresilience climate which allows it to stabilize the surface temperature, in particular by regulating the level of CO2 in L’atmosphereatmosphere. This mechanism, which is an integral part of the carbon cycle, is based on a series of physico-chemical reactions which involves the … Read more