When did Horizon Season 35 Episode 18 air?
Horizon Season 35 Episode 18 aired on November 5, 1998.


Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
In this program, Horizon reveals how laughter and play are crucial to the development of the brain, and how some scientists are recommending play as an alternative to drugs in helping to treat hyperactive youngsters.
Direct answers for episode-level questions and details.
Horizon Season 35 Episode 18 aired on November 5, 1998.
This episode runs for approximately 60 minutes.
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