HumansWhat do unconscious bias tests really reveal about racism? Psychologists have shown that reflexive biases influence our perceptions of others, potentially explaining the persistence of various forms of prejudice. But reliably measuring our implicit biases is trickier than it first appeared Features
HumansLisa Piccirillo: How I cracked a 50-year-old maths problem in a week Solving the Conway knot problem took mathematician Lisa Piccirillo on a journey into the fourth dimension. Here's how she did it Features