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Weight and Strength - The Curious Cases of Rutherford and Fry

Why do we get middle aged spread? And what is the strongest substance in the world?

Two cases today for Drs Adam Rutherford & Hannah Fry to investigate, involving strength and weight.

The Portly Problem

"Why do we have middle aged spread?" asks Bart Janssen from New Zealand. In this episode we ponder the science of fat, from obese mice to big bottoms.

Why do we put on weight in middle age? And are some types of fat better than others? Hannah meets Prof Steve Bloom at Imperial College, London to discuss why pears are better than apples when it comes to body shape.

And Adam talks to Dr Aaron Cypess from the National Institutes of Health in Maryland, who has created a 'fatlas' - an atlas that maps fat inside the body.

The Strongest Substance

"What is the strongest substance in the universe?” asks Françoise Michel. “Some people say it is spider web, because it is stronger than steel. Is it iron? Is it flint? Is it diamond because diamond can be only be cut by diamond?"

Adam and Hannah put a variety of materials, from biscuits to toffees, under the hammer to test their strength.

In their quest to find the strongest substance on earth they quiz materials scientist Mark Miodownik, engineer Danielle George and spidergoat creator, Dr Randy Lewis from Utah.

Please send your Curious Cases for the team to investigate to curiouscases@bbc.co.uk

Photo: A man works out at a slimming centre in Beijing, credit: LIU JIN/AFP/Getty Images

Presenters: Adam Rutherford, Hannah Fry
Producer: Michelle Martin

Available now

26 minutes

Last on

Tue 31 Jan 2017 07:32GMT

Broadcasts

  • Mon 30 Jan 2017 19:32GMT
  • Mon 30 Jan 2017 20:32GMT
  • Mon 30 Jan 2017 21:32GMT
  • Tue 31 Jan 2017 02:32GMT
  • Tue 31 Jan 2017 03:32GMT
  • Tue 31 Jan 2017 04:32GMT
  • Tue 31 Jan 2017 05:32GMT
  • Tue 31 Jan 2017 07:32GMT

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