World Cup raises epidemic questions

World Cup raises epidemic questions
Brazil had 1.2 million cases of dengue (“breakbone”) fever last year. What is the threat to World-Cup spectators? How do scientists More »

Lies and liars: Can you catch them?

Lies and liars: Can you catch them?
We asked how to catch a liar. Liars challenge our law, economy and society. If you want to catch a liar, you might as well flip a coin. More »

College admission conundrum?

College admission conundrum?
Critics carp about college entrance exams and point to data showing that high-school grades better predict success. How do the More »