People who make a habit of sleeping on the job comprise a secret society of sorts within the U.S. labor force. Inspired by famous power nappers Winston Churchill and Albert Einstein, today's committed nap-takers often sneak in short rest breaks because they think the practice will improve their cognitive performance but still carries a stigma.

Hamilton has endured a difficult 18 months, particularly in qualifying. The Independent crunches the lap times

After a difficult weekend at the Hungarian Grand Prix, an F1 legend wonders about Lewis Hamilton’s Ferrari future