The Thrill Laboratory took over the Broadway Cinema in Nottingham as part of the Mayhem Horror Film Festival. Fear, panic and arousal were monitored in four people watching Piranha 3D. Dr Brendan Dare talks us through the special equipment used, including 3D gas masks to monitor breathing.
In this week's show and tell section, we look at a study that zapped students with electricity to improve their maths performance; an implant for helping blind people see; holographic communications and Nasa's robonaut. Nell Boase, Ian Sample and Robin McKie help us rake over the week's science news.
What can evolutionary psychology teach us about leadership? Mark van Vugt and Anjana Ahuja discuss their new book Selected: Why Some People Lead, Why Others Follow and Why it Matters. They argue that Adolf Hitler was a "good" leader.
WARNING: contains strong language.
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