A normal viscous fluid can be set in motion only by a difference in pressure: squeeze one end of a straw and the fluid inside will move instantly to a lower-pressure region. This means that the flow ...

Pens, pencils and a facility with numbers. Also helpful: earplugs, plushies, a water bottle, calming herbal oil and the occasional “wild bifurcation” (a.k.a. a wild guess). Competitors at the World ...

The appeal of sudoku has spread to the prokaryotic world. A strain of Escherichia coli bacteria can now solve the logic puzzles – with some help from a group of students at the University of Tokyo, ...

Good Sudoku for iOS is a new app that’s launched today from veteran game developer Zach Gage aiming to reinvigorate the digital version of the popular puzzle game. The app comes with a thoughtful ...

Daily puzzlers would be quick to tell you that sudoku, Wordle’s mathematical cousin, is not as easy as it looks. The small grid, found often next to a word scramble or comic strip in a print newspaper ...