The Why Factor Episodes Available now
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The Handshake
Millions of us use this gesture but where does this everyday ritual come from?
The Shaved Head
Why do we care so much about the hair on our heads? Join Mike Williams to find out why.
Why do we laugh?
What is it that actually triggers our laughter, do all of us find the same things funny?
The Bullet
The history and design of the bullet and why people use them
Why do we smoke?
In this week's programme Mike Williams looks at why people start smoking.
Why do we Behave so Oddly Inside Elevators?
This week, the lift. Why do we behave so oddly inside them?
Why do we wear ties?
Why do we do the things we do? This week, Mike Williams asks why we wear neckties.
Why do we have tattoos?
Mike Williams on where tattoos come from and what they say about us.
The Best of One Planet
For the final edition of One Planet, we look back at some of our greatest hits.
A Global Audience With Sir David Attenborough
Mike Williams talks to Sir David Attenborough about his life and work (repeat)
