3,159 articles mezi dny 1.7.2022 a 31.7.2022

India bans many single-use plastics to tackle waste

India imposed a ban on many single-use plastics on Friday in a bid to tackle waste choking rivers and poisoning wildlife, but experts say it faces severe headwinds from unprepared manufacturers and consumers unwilling to pay more.

Which rules evolutionary change: Life or climate?

The fossil record over the last half a billion years shows biodiversity as a zigzagging pattern of species births and extinctions. For decades scientist have attempted to answer the question: Which rules supreme—life or the environment? To explain this macroevolution, scientists have used two opposing theories: the Red Queen versus the Court Jester theory, inspired by the story Alice in...

A gentler, more precise laser cutting technique

Laser cutting techniques are usually powered by high energy beams, so hot that they melt most materials. Now scientists from McGill University have developed a gentler, more precise technique using low-power visible light.

How COVID-19 put poverty reduction back on the agenda

Lower income people bore the brunt of the economic repercussions of the COVID-19 pandemic. As a result, efforts to reduce poverty were adopted in Canada and the United States. But how did partisan politics shape each government's response? Exploring the political dynamics at play, a team of researchers including McGill University Professor Daniel Béland, traces the adoption and evolution of...

Australia’s 10,000 deaths and the paradox of ‘Covid normal’

The country has fared better than others – but those on the frontline are still wrestling with the agony of the coronavirus pandemicNot just a number: families of five Australian pandemic victims reflect on loss during CovidTen thousand Covid deaths and counting … the road to Australia’s grim milestoneGet our free news app; get our morning email briefingIn August 2020, staff at the Menarock...

Capturing the onset of galaxy rotation in the early universe

As telescopes have become more advanced and powerful, astronomers have been able to detect more and more distant galaxies. These are some of the earliest galaxies to form in our universe that began to recede away from us as the universe expanded. In fact, the greater the distance, the faster a galaxy appears to move away from us. Interestingly, we can estimate how fast a galaxy is moving, and in...

Ancient galaxy’s spin suggests universe’s first stars quickly coalesced into disks

Astronomers have detected the rotation of a galaxy dating back to just 550 million years after the big bang, when the universe was 4% of its current age. The rotation suggests this baby galaxy was not an amorphous blob but rather an organized disk, just like the Milky Way and similar galaxies that have had more than 13 billion years to mature. It’s yet more evidence that galaxies grow...