How does push-button start work on cars?

Push-button start is standard on most modern cars, trucks and SUVs today. How does it work and is it better than ignition keys?

Inside the tactic NFL teams are using to combat the tush push

Teams are using disconcerting signals on defense -- mimicking the snap count -- and the way the game is officiated makes it ...
Yardbarker

Another NFL team is considering using the tush push

The Philadelphia Eagles are still the only team that has mastered the “tush push” play, but at least one other squad is ...
Philadelphia Tribune

Push on! Eagles use tush push on opening drive after short-yardage play nearly banned in NFL

PHILADELPHIA — The tush push is still legal in the NFL — and about as unstoppable as it was in an ill-fated push to ban it for the Super Bowl champion Philadelphia Eagles. Even with Super Bowl MVP ...