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?
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Why did some cars have push-button transmissions? Explained

Push-button transmissions, a unique feature in automotive history, once captured the attention of car enthusiasts and ...
Jalopnik

Here's How Keyless Cars Can Start Even With A Dead Fob Battery

We really are living in the future when your car just magically knows you're there without you having to do anything. The jingling of keys used to be the universal symptom of turning a car on, but ...
autoevolution

Unassuming Sleeper: 1966 Dodge Coronet Packs Hemi Muscle, but It's No 426

With only 740 units built, the 1966 Dodge Hemi Coronet is a rare and expensive classic. This one has a different type of Hemi ...