FBI wants public to help break murdered man's code

A lifelong fan of codes, Ricky McCormick wrote out two pages of letters, numbers and symbols and stuck them in his pocket. His body was found in a Missouri cornfield in the summer of 1999, those two sheets of paper still ...

How to Measure What We Don't Know

(PhysOrg.com) -- How do we discover new things? For scientists, observation and measurement are the main ways to extract information from Nature. Based on observations, scientists build models that, in turn, are used to make ...