How many games are in an NFL regular season since 2021?

Who holds the NFL record for career points scored? Who set the NFL single-season receiving yards record of 1,964 yards in 2012? Who threw for 5,477 yards in 2013, the NFL single-season record? Which player has won the most Super Bowl rings? How many yards must a team gain to earn a first down? From which yard line is the extra-point kick snapped since 2015? Which team won Super Bowl I? Which team won Super Bowl II?