Episode 6

Image for Episode 6Not currently available on BBC iPlayer

Bang Goes the Theory, Series 5 Episode 6 of 8

Duration: 30 minutes

Dallas downs his toothbrush to discover what causes tooth decay and gum disease, Yan explains why refreezing food is not a great idea, and Jem investigates new research that electric lights can play havoc with the way we sleep.

  • Smile for the camera

    Smile for the camera

    Dallas makes new friends in his investigation into tooth decay. Find out why some of our ancestors had better gnashers than others, and how you should look after your own.

  • Grin and bear it

    Grin and bear it

    And now a friend Dallas was less keen to meet... open wide now.

  • Puzzle: Fold me to the Moon

    Puzzle: Fold me to the Moon

    How many times would you need to fold a piece of paper in half before you had a wedge tall enough to reach the Moon?

    In the Clips section above, Dr Yan shows you how to work out the surprising answer to his latest brain teaser. In fact, it just might be the answer to everything.

  • Spectroscopy

    Spectroscopy

    Spectroscopy is a technique used to analyse light by breaking it apart into its component colours. Astronomers use it to work out the composition of stars.

    Watch more BBC videos on spectroscopy
  • Ask Yan: How do you make a rainbow?

    Ask Yan: How do you make a rainbow?

    Tia from Southend-on-Sea once asked Dr Yan: How do you make a rainbow? In this video Dr Yan does what he does best and explains the answer.

    Watch Dr Yan explain how you make a rainbow

Credits

Presenter
Liz Bonnin
Presenter
Liz Bonnin
Presenter
Dallas Campbell
Presenter
Dallas Campbell
Presenter
Jem Stansfield
Presenter
Jem Stansfield
Series Producer
Paul King
Series Producer
Paul King

Broadcasts

The Open University

The Open University

If Bang stirs your interest in science then visit The Open University and discover more.

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