Podcasts · Science for Kids / Science's Not Boring: The Kids Science Podcast

How does a telephone work?

18 Jun 2026 · 13 min · S1 E4

Have you ever wondered how your voice travels to a friend on the exact opposite side of the world in less than a single second? Join Mira and Finn on an unbelievable scientific journey to find out! Discover the hidden magic inside your telephone. You'll learn how your vocal cords create invisible wiggling waves in the air, and how a tiny microphone translates those wiggles into zooming electricity! Travel back in time to 1876 to witness Alexander Graham Bell accidentally spilling battery acid on his pants during the very first phone call! Then, dive two miles deep into the freezing, pitch-black ocean where the world's longest communication cables lay hidden. Did you know that your voice actually turns into blinking laser light zipping through glass threads thinner than a single human hair? It is completely true! You will even find out why fierce ocean sharks sometimes try to take a giant bite out of our internet cables! Get ready for mind-blowing speeds, super-cool science facts, and a fun quiz at the end to test your brainpower. Tune in now and you will never look at your phone the same way again!