Science is becoming less disruptive. Is an aging workforce to blame?

Physicist Albert Einstein, widely regarded as one of the most prolific scientists of the past century, conducted much of his transformative work at the beginning of his career, before spending years defending his theories against the burgeoning field of quantum mechanics.  A new study shows that Einstein is not alone, and that most researchers begin their careers conducting their more disruptive work — overturning conventional wisdom and forging paths of their own — but as they age, they tend to...