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The 65-team NCAA men's basketball tournament begins this week. Defending champion Florida, North Carolina, Ohio State, and Kansas are the top seeds. In picking this year's at-large teams, the selection committee favored clubs from the power conferences.

Until 1974, presidents could take documents with them when they left office. Now every presidential document, from notebook doodles to top-secret security plans, belongs to the National Archives.

For the first time this century, two No. 1 seeds didn't make it to NCAA women's basketball's Sweet 16. And teams who geared up with transfers are challenging historically dominant programs.

The reptile lived in oceans between 247 million and 249 million years ago. It was as big as a whale, with a dolphin's narrow snout, no teeth and a jaw that it could sort of un-hinge while feeding.

There were hopes over the weekend that ISON might have survived its close encounter with the sun. But "with more than a little sadness," the space agency says, "we have to declare the comet lost."

A referendum next month in Sudan will decide whether the country will be divided between the Arab, mostly Muslim north and the ethnic African south. Whether things turn bloody may hinge on what happens in Abyei, a disputed region along the border of north and south.

An uproar followed comments by Sanofi's CEO that if the company develops a vaccine, doses would likely go to Americans first. The board president later insisted, "Any vaccine will be a public good."

NPR's Scott Simon asks ESPN's Michele Steele about who will be in and who will be out of the men's and women's college basketball tourney.