The coronavirus strain first linked to the COVID epidemic in India has now spread to at least 44 countries and been classified as a "variant of concern", but health authorities still know relatively little about it.

In research made possible when COVID-19 sidelined other research projects, scientists at Johns Hopkins Medicine meticulously counted brain cells in fruit flies and three species of mosquitos, revealing a number that would surprise many people outside the science world.

Being treated fairly is important—but fairness alone isn't enough to make people feel valued in a workplace or other groups, new research suggests.