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Beer bubble math
The rate of change of bubble volume. If this quantity is positive, the bubble will grow; if it’s negative, it will shrink. A constant that depends on the temperature and the specific gas in the foam. (The foam on top of a glass of Guinness lasts unusually long because Guinness uses nitrogen in addition to […]
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- Health & Medicine
Body & Brain
Fat joins suite of tastes, plus crossword vision, metastasis clues and more in this week’s news.
- Life
Diving spiders make their own gills
Eurasian diving bell spiders, the only truly aquatic arachnids, survive underwater with the help of “physical gills,” scientists say.
