• Voice breaking
  The size of your voice box and your vocal cords affects how deep your ...

• Shaping sounds
  Your lips, teeth, tongue, cheeks and throat muscles help you shape ...

• Lump in your throat
  If you look in a mirror and swallow, you will see a lump in your ...

• Perfect pitch
  Muscles in your voice box alter the shape of your vocal cords to ...

• DID YOU KNOW?
  A bird does not shape sounds with its mouth, as you do. Birds do not ...

• Prehistoric talk
  Scientists think that, until about 40,000 years ago, people's skulls ...

• Tonsils on guard
  Your tonsils are two fleshy pads on either side of your throat. They ...

• Sound sinuses
  Your sinuses are air-filled hollows inside the bones of your skull. ...

• Amazing But True
  People on La Gomera, in the Canary Islands, mainly speak Spanish. But ...

• Speed speaking
  Most people find it difficult to speak clearly at over 300 words a ...