Tuesday/ who may marry (in the United States)?

The US Supreme Court heard arguments today for and against same-sex marriage.  Has the definition of marriage changed over the last thousand years?  I would say it has. Should it change to allow gay couples to marry?  Should one State recognize the marriage from out-of-State married visitors? (Since some States in the USA allow gay couples to marry and others absolutely do not).  Here are some audio transcripts from the court, again courtesy of the New York Times.  The justices’ ruling is due in June.