Cornell physicist Veit Elser has been engrossed recently in resolving a pivotal question in biological imaging. So he hasn't had much time for brainteasers and number games. But in discovering an ...

Every online bank transfer, private message and Bitcoin transaction rests on the assumption that some math problems are ...

Sudoku is more than just a pastime; it’s a mental workout that sharpens logic, patience, and problem-solving skills. From casual enthusiasts to competitive solvers, players are constantly seeking ways ...

A couple years ago, Google kicked off an experiment that included house numbers from Google Street View in reCAPTCHAS, the means by which websites reduce spam. Today on the Google Online Security blog ...