Physicists have taken quantum strangeness to an extraordinary new level by measuring light across 37 dimensions. Their ...

In mice, for example, experiments showed that pheromones acted as attractants between males and females who were genetically similar except that they differed in a certain type of immune system gene.

Scientists often want to find out if changing one variable makes a difference to other variables. In many (though not all) investigations the variables are kept constant - the control variables ...