Terrestrial Gamma-ray Flashes, More Common Than Previously Thought?

Source - NASA Science News for Dec. 31, 2014

New research shows that terrestrial gamma-ray flashes arise from an unexpected diversity of thunderstorms storms and may be more common than previously thought.

The complete article can be found here: http://science.nasa.gov/science-news/science-at-nasa/2014/31dec_tgfs/

Is Vesta the "Smallest Terrestrial Planet?"

Source - NASA Science News for Dec. 9, 2011

NASA's Dawn probe, now orbiting Vesta in the asteroid belt, has found some surprising things on the giant asteroid--things that have prompted one researcher to declare Vesta "the smallest terrestrial planet."

FULL STORY at http://science.nasa.gov/science-news/science-at-nasa/2011/09dec_vestaplanet/

Below is a video version of this story which is also available at: http://www.youtube.com/watch?v=_JBNkts5YXA