Search engines like Google and Bing claim to be free, but users pay by surrendering their data—surely you’ve noticed that ads for a product you recently researched magically begin appearing on every ...

Two of NASA's giants of cosmic discovery, including a rover that launched from Florida, have been named among the best inventions of the past quarter-century – at least, according to Time magazine.

SPECIAL MENTION: Can you sleep better with a pillow that changes temperature? Moona thinks so. Its bedside system ($399) circulates water through a thin pad that slips inside your pillowcase, varying ...