Unwind by hunting for words on the day’s themed list — they’re hidden horizontally, vertically, diagonally and backward. Come back daily for a new theme or to browse the recent archive. Jump in to ...

Mathematicians finally understand the behavior of an important class of differential equations that describe everything from water pressure to oxygen levels in human tissues. The trajectory of a storm ...

A differential equation is an equality constraining a mathematical function in relation to its derivatives over one or multiple variables. Such equations may constitute the mathematical model for a ...

Challenge yourself each day to find words of 4 or more letters using the letter at the center of the flower. Advance based on the quantity and length of words you find. Can you make it to Golden Poppy ...