Scientists unlock secret to thick, stable beer foams

Triple-fermented Belgian beers have the longest-lasting foam; single-fermented lagers have the shortest. For many beer lovers, a nice thick head of foam is one of life’s pure pleasures, and the longer that foam lasts, the better the beer-drinking experience. A team of Swiss researchers spent seven years studying why…

How the cavefish lost its eyes—again and again

Mexican tetras in pitch-black caverns had no use for the energetically costly organs. Time and again, whenever a population was swept into a cave and survived long enough for natural selection to have its way, the eyes disappeared. “But it’s not that everything has been lost in cavefish,” says…