The team puts science to the test. Jem straps a race horse to his car to explain what horsepower is, while Liz sets Dallas a free diving challenge that leaves him gasping for air. Show more
Discover 11,128,835 listings and 279,887 playable programmes from the BBC
The team puts science to the test. Jem straps a race horse to his car to explain what horsepower is, while Liz sets Dallas a free diving challenge that leaves him gasping for air. Show more