What makes something alive? We simply don't know, but synthetic biologists are a step closer to providing an answer thanks to ...

Solve the grid in our daily expert Sudoku puzzle! Try a game with a mathematical twist, Killer Sudoku, here. The objective of Sudoku is to fill each row, column and sub-grid with exactly one of each ...

Find answers to the latest online sudoku and crossword puzzles that were published in USA TODAY Network's local newspapers.