For its next surprise drop, YETI launched Beekeeper and Papaya versions of its popular items, including the YETI Rambler Straw Mug. Between now and Tuesday, May 20, at 10 a.m. ET, only members can ...

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Surprise: You can answer this question with modern algebra. Most folks who have ...