• Is the galaxy full of Earths?

    Jim Bell says NASA's latest discovery support the notion that habitable worlds are probably common in the galaxy.

  • Ukraine crisis could pull U.S. to war

    Graham Allison says if an unchecked and emboldened Russia foments conflict in a nation like Latvia, a NATO member with a Russian speaking population, the West would have to defend it.

  • See why Navy paid $3 billion for this

    The US Navy's newest stealth destroyer is twice as long as the Statue of Liberty but barely shows up on radar.

  • The best show you're not watching

    If fans thought season one of "Orphan Black" was mysterious, get ready to spiral deeper down the rabbit hole for a second season. The show returns this Saturday April 19 on BBC America.
  • Rocket 'War' Lights Up Greek Sky

    Handmade rockets are fired at two rival churches in an annual event on Chios Island, Greece. The side with the most direct hits of the opposing church is crowned the winner.

  • Transcripts Show Confusion and Inaction as Korean Ferry Sank

    The confirmed death toll from the ferry that sunk off the coast of South Korea rose to 58 on Sunday — as a newly released transcript shows the confusion that ensued in the half hour between the first distress call and the evacuation of the ship.

  • Animal Kingdom: William and Kate Feed Aussie Giraffes

    Prince William and Catherine, Duchess of Cambridge, feed giraffes at Sydney's Taronga Zoo on Sunday.

  • Senators: We Should Not Wait to Help Ukraine

    Following Ukrainian Prime Minister Arseniy Yatsenyuk exclusive interview with NBC News' David Gregory on Meet The Press Sunday, U.S. senators said America should not wait for Russia to make more threats before sending more security aid.