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Liz Bonnin investigates recent research into the magnetic qualities of cows, while Dallas Campbell puts psychological priming to the test.
Dallas Campbell traces the journey of 30,000 plastic ducks, while Liz Bonnin goes on manoeuvres in the Royal Navy's new search and rescue sub.
Jem Stansfield attempts to defeat the US Navy's latest weapon with no more than some foam and a crash helmet, while zoologist Liz Bonnin gets in contact with her frog brain.