Skeptic misses the point behind UFO book

Leslie Kean, author of "UFOs:  Generals, Pilots and Government Officials Go on the Record," says that criticism of her book is misplaced — and that a systematic study of unidentified flying objects is sorely needed. Full story

Solar storm sparks northern lights

  A massive solar flare causes a beautiful light show in the northern skies. Space expert James Oberg explains what's behind the celestial show.

NASA's 'Puffin' a hybrid helicopter, plane 

  Jan. 24: NASA engineers unveil plans for the 'Puffin,' the aircraft would take off like a helicopter and fly like a plane. Msnbc's Alex Witt talks with NBC space analyst James Oberg.