I don't know how long this link will stay active.
This episode relates to the search for near Earth asteroids, the results of impacts on the Earth and the possibility of water and the stuff of life coming to this planet by way of asteroid impacts.

The Passionate Eye is a fantastic series of documentaries.
http://www.cbc.ca/documentaries/passionateeyeshowcase/video.html

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I do not fight fascists because I think I can win.
I fight them because they are fascists.
Chris Hedges

A riot is the language of the unheard. -Martin Luther King, Jr.