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The team take on more scientific challenges. Dallas goes supersonic and meets the team behind a 1000mph car, Jem tests some homemade glues and Dr Yan puzzles commuters.
The team take on more scientific challenges. Liz looks at the new IVF research that may increase success rates, and Jem tries to go 360 degrees on a playground swing.
Jem demonstrates what a calorie is, Dr Yan tests the ability of MPs to calculate risk, and Liz investigates whether we are running out of antibiotics and what will happen if we do.