Other than a bowl of buttered popcorn and a multi-episode House of Cards binge, what are the keys to a successful marriage? Researchers at U.C. Berkeley tracked more than 150 couples in an effort to answer that question. Interestingly, they learned that DNA can play a major role in determining whether a person feels marital bliss. They also focused on how couples handle heated arguments: “If the wife could calm down shortly after the conflict, the marriage had a better chance of succeeding. Whether the husband was able to regulate his emotions had little to no role in long-term marital satisfaction.” (It’s gonna be a long Valentine’s Day for the dude who published that finding…)