Puzzle 1: You are given nine gold coins that look identical. You are told that one of them is fake, and that this coin weighs ...

Test your problem-solving skills with these 62 lateral thinking puzzles. They’ll challenge you to think out of the box to ...

Holdings from the library at the Goddard Space Flight Center, which includes unique documents from the early 20th century to the Soviet space race, will be warehoused or thrown out. By Eric Niiler Our ...