I do not know exactly what principle of physics this straw is demonstrating, but I will take a stab at it: whether because it is black or not, it has absorbed and retained a certain amount of heat. Enough, anyway, to keep the liquid around it just that little bit warmer and thus precipitate out the bubbles. Sounds plausible, right? But I am guessing.
Another nice visual illustration of a) physics and b) that it was far too nice a day to be sat in an office. I like also the little ‘V’ to the right which, if you look closely, seems to be caused by a swan, maybe mimicking that bigger metal brother. I bet its wake won’t end up spreading across the whole width of the lake though: which the boat’s did manage.
Found myself in the Physics and Astronomy building on Manchester today, named for Arthur Schuster, physicist and coiner of the term ‘antimatter’ whose bust in the foyer currently sports a rather fetching pink bow tie and fluffy rabbit ears. And why not.
Being 42 