Blog: Olly WehringHappy St Patrick's Day

Olly Wehring | 17 March 2010

A very Happy St Patrick's Day to you all. And how am I going to celebrate this evening? Why, I'm going to a tasting of The Balvenie... which is a Scotch...

Anyway, in honour of all things Irish, we're glad to shed some light on what, I'm sure, has been keeping many of you awake at night for years.

The Daily Express has reported today (17 March) that scientists have been able to pin down exactly why the bubbles in a pint of Guinness sink instead of rise.

By using a “super-fast” camera (very technical) that magnifies the bubbles ten times, members of the Royal Society of Chemistry noticed that bubbles in the centre of the glass rise rapidly, pulling the surrounding liquid with them and setting up a circulating current.

Flowing outwards from the head of a pint of Guinness, the current hit the glass edge and was pushed down.

Bubbles held back by dragging on the side of the glass were caught in the circulation and forced to go with the flow - the wrong way.

If you have any other national holiday-related conundrums you'd like us to look into, please, go away.


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