Sean Morey, then with the Arizona Cardinals, celebrates after blocking a punt against the Seattle Seahawks in 2007. Morey, who suffers from post-concussion syndrome, retired from the NFL in 2010 on the advice of doctors.
Stephen Dunn/Getty Images
Ford's use of a moving line reduced a car's assembly time from 12 hours to 93 minutes, but this made the work repetitive for workers like the ones here, who are making flywheels. So Ford paid workers $5 a day, an extraordinary amount at the time.
A group called StudentRND throws 24-hour code-a-thons for programmers of all backgrounds and skill levels. Coders show up at noon on Saturday, pitch ideas, form teams and code through the night trying to finish by noon on Sunday. Above, StudentRND participants work at a 2011 CodeDay in Seattle.
Computer networks and GPS systems are only possible because of the precision timekeeping of atomic clocks like the one above, says clockmaker and physicist Jun Ye.
Ye Group and Baxley/JILA
Pope Francis waves to faithful during the Angelus prayer from his studio overlooking St. Peter's Square at the Vatican on Sunday. President Obama will meet with the pope for the first time in March.
President Barack Obama talks about National Security Agency surveillance Jan. 17 at the Justice Department in Washington. Seeking to calm a furor over U.S. surveillance, the president called for ending the government's control of phone data from hundreds of millions of Americans and immediately ordered intelligence agencies to get a secretive court's permission before accessing the records.