B Rosen/FlickrPopping a bottle of champagne that has been stored at 20 degrees Celsius (something one really ought never do) ejects a fleeting "mini-cloud" colder than ice and blue as the sky, awestruck scientists said on Thursday. When opening bottles at 20 C, "we observed a bluish cloud that was totally unexpected," said study co-author Gerard Liger-Belair, a professor at the University of Reims in France's Champagne region, where he studies bubbles and foam. The recommended drinking temperature for bubbly is 8-10 C.At 20 C, the study authors found, something strange happens. "This blue cloud has the same physical origin as the blue colour of the sky. The blue fog is not visible to the naked eye as it lasts only about two or three thousandths of a second.

Source: The Local September 14, 2017 16:18 UTC