University of Illinois chemistry professor Alexander Scheeline has developed software that turns a camera phone, an LED, and a few other cheap tools into a spectrometer. Armed

The impulse to be social is so deep-seated in human consciousness that it’s even evident in the womb, suggests a new study on the interaction of twins just a few months after conception.

Twin pregnancies offer “the unique opportunity to explore social behavior before birth,” wrote researchers led by psychologist Umberto Castiello of Italy’s