Gregory Treverton, a national security expert at RAND Corporation, famously distinguished between two types of problems, puzzles and mysteries. He was describing the modern challenges faced by the ...

Raccoons kept working a puzzle box long after they had already eaten the only treat inside, according to a new University of British Columbia study that reframes how scientists think about animal ...

Security pros tackle tough problems every day, from breach investigations to niche technical issues to strategy and policy development. The key to maintaining and improving these critical ...

An overwhelming number of subjects woke up remembering dreams in which they were trying to crack puzzles that they hadn’t been able to solve before they dozed off. Even more amazingly, they were more ...

Food puzzles can help solve dogs' behaviorial problems. June 3, 2010— -- Pursuing food was an all-consuming life for our dogs' ancestors. While it might seem an improvement to have meals handed ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." When 2D puzzles are no longer exciting, 3D brain teasers are the way. These handheld puzzles require ...