Today, most answering machines are digital, and use the same technology as a CD or MP3 player. Learn more about digital answering machines in this HowStuffWorks podcast.
BrainStuff
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Did the Maya Civilization Fall Because of Climate Change?
BrainStuff Classics: What's the History of Nail Polish?
BrainStuff Classics: Do Dogs Get Embarrassed When We Put Them in Costumes?