309 articles from MONDAY 25.1.2021

What's in a name? A new class of superconductors

A new theory that could explain how unconventional superconductivity arises in a diverse set of compounds might never have happened if physicists Qimiao Si and Emilian Nica had chosen a different name for their 2017 model of orbital-selective superconductivity.

When galaxies collide

It was previously thought that collisions between galaxies would necessarily add to the activity of the massive black holes at their centers. However, researchers have performed the most accurate simulations of a range of collision scenarios and have found that some collisions can reduce the activity of their central black holes. The reason is that certain head-on collisions may in fact clear the...

White turns into (extreme-)ultraviolet

Researchers from the Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy (MBI) have developed a new method to modify the spectral width of extreme-ultraviolet (XUV) light. By employing a novel phase-matching scheme in four-wave mixing, they could compress the spectral width of the initial broadband light by more than hundred times. The detailed experimental and theoretical...

Women influenced coevolution of dogs and humans

A cross-cultural analysis found several factors may have played a role in building the relationship between humans and dogs, including temperature, hunting and surprisingly - gender. The analysis used ethnographic information from 144 traditional, subsistence-level societies from all over the globe. People were more likely to regard dogs as a type of person if the dogs had a special relationship...

Global coronavirus report: Mexico's president tests positive; Joe Biden to reinstate travel bans

López Obrador to speak to Putin about obtaining Russian vaccine; Biden to include South Africa in restrictions for non-US travellersCoronavirus – latest updatesSee all our coronavirus coverageMexico’s president, Andrés Manuel López Obrado – who has long been accused of complacency in his approach to the pandemic – has tested positive for Covid-19 and is undergoing treatment with mild...