The Discovery Channel has been running new commercials that preview upcoming new seasons for several of their shows. As in the past, the commercials are well-made and (for me at least) can get you really jazzed up for many of their shows. They’ve obviously got a great advertising team and I wish they’d post these commercials on their own site (where you can now get full video of most of their shows). Instead, we need to hunt around to dig up copies like this one: [ View this video on YouTube. ] The montage commercials they showed last year were…