In addition to honoring fallen service members, Memorial Day has come to be known as the unofficial start of summer, which can mean lots of ice cream, unless extreme temperatures cause people to forgo the treat. Ice cream consumption is down, with some theorizing hotter temperatures due to climate change prompt more people to choose a cold drink over ice cream. Marion Nestle, professor of nutrition and food studies at New York University, said when people buy just a pint rather than a quart or more, cost is another big factor. ...