after a long drive from the southernmost end of the country to the westernmost edge, the Birch Drop is the perfect concoction with just the right hint of sweetness for a weary traveler 👌🍹 1 ♡ 1 ✍
What floats down ... Observant beer drinkers might notice that when beer is poured into a glass, the bubbles seem to defy the laws of physics, floating down instead of up.
Turns out those people haven't had too much to drink. Beer bubbles really do float downward sometimes, according to a 2004 analysis by Stanford researchers. Because of the drag from the walls of the glass, they found, the beer bubbles float up more easily in the center of the glass. As those bubbles go up, they pull the surrounding liquid to the surface. When the bubbles join the froth, or 'head' of the beer, the liquid begins to pour back down the sides of the glass, dragging smaller bubbles down with it.
The researchers used a super-slow-motion camera to capture the bubbles' descent and figure out the mystery. That’s one way to win a bar bet. 10 ♡ 1 ✍