Why do Guinness bubbles go downwards?

14 March 2014
Presented by Chris Smith


A pint of Guinness


How do the processing power of a brain compare with a computer? How can we shield astronauts en-route to Mars? Do ants prefer protein? What causes left handedness? Why do bubbles go downwards in a glass of Guinness? And do older makes of television emit X-rays?


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