I watched the first episode of a great new show for Discovery Channel called "Bad Universe". The guy doing the show is an astronomer and author I really like, Phil Plait, who wrote a book called
Bad Astronomy that dealt with astronomy myths and misconceptions and a second one called
Death From the Skies that was about various astronomical threats to us, such as asteroid, comets, black holes, solar flares, alien attacks, supernovas, and gamma ray bursts.
The show is along the lines of the book. This episode was about asteroids and comets. Like the book it starts off with a plausible scenario (in this case a few dozen meter asteroid hitting Sydney), then goes into more detail about the science behind asteroid and comet impacts, including a number of scale experiments to see what the effects would be and how effective different strategies would be for protecting us. When I say "scale", I mean their first experiment is to blow up a
7000 pound fertilizer/fuel oil bomb (equivalent to about 3000 pounds of TNT) to see simulate an impact (that is about 1/20th scale for what they are looking at).
In short, imagine Mythbusters dealing with space, and a lot bigger explosions. There was a lot of interesting science, cool facts, fancy CG reconstructions, explosions, big guns, lasers, and some more cartoony reconstructions (the dinosaur extinction event was made to look like an animated comic book, for instance).
I thought it was pretty cool, although he was
really pushing for people to take this threat seriously (which I agree with). It is pretty staggering how little effort is being put into this. I am also a bit disappointed they didn't discuss more about the Tunguska impact, since I think that would have driven the message home more.
This is just the first episode, judging from the intro they are also going to deal with at least: alien invasions, black holes, supernovas, and solar flares.
So I would say, probably 9/10, only because I don't think the 3D reconstruction of the impact was as good as it could be, they skipped Tunguska, and Phil didn't come across as serious as he probably meant to when emphasizing the threat.