Why Do We Talk?

Talking is something that is unique to humans, yet it still remains a mystery. Horizon meets the scientists beginning to unlock the secrets of speech - including a father who is filming every second of his son's first three years in order to discover how we learn to talk, the autistic savant who can speak more than 20 languages, and the first scientist to identify a gene that makes speech possible.

Other episodes for this season

Do I Drink Too Much?
Episode 1 - Do I Drink Too Much?
The Secret You
Episode 2 - The Secret You
Fix Me
Episode 3 - Fix Me
Who's Afraid of a Big Black Hole?
Episode 4 - Who's Afraid of a Big Bla...
Why Do We Talk?
Episode 5 - Why Do We Talk?
How Long is a Piece of String?
Episode 6 - How Long is a Piece of St...
The Secret Life of the Dog
Episode 7 - The Secret Life of the Do...
Why Do Viruses Kill?
Episode 8 - Why Do Viruses Kill?
Pill Poppers
Episode 9 - Pill Poppers
Don't Grow Old
Episode 10 - Don't Grow Old
To Infinity and Beyond
Episode 11 - To Infinity and Beyond
What Makes a Genius?
Episode 12 - What Makes a Genius?
Did Cooking Make Us Human?
Episode 13 - Did Cooking Make Us Human...
Is Everything We Know About the Universe Wrong?
Episode 14 - Is Everything We Know Abo...