Brain exercises let you practice specific cognitive skills that exercise memory, attention span, logic, and fast thinking.

Put your problem-solving skills to the test with this challenging brain teaser puzzle. Follow along, think critically, and ...

Visit play.usatoday.com for a one-stop hub for daily puzzles, crosswords, and brain teasers designed to keep your mind active and your mood lifted.

This jigsaw puzzle is a photo of a gum-stick-size chip used to test an antiviral, and it is courtesy Caleb Jia.