Continuing their dedication to HD with a successful broadcast channel in high resolution still wowing on Sky, National Geographic are now taking the full plunge into Blu waters.IMAX: Extreme is a VC-1 encoded display of snowboarding, surfing, windsurfing and rock climbing that, recorded in this widescreen format, looks like it could be a superb addition to National Geographics’s already impressive HD output. Paired up with Dolby 5.1 Surround this is one thrill ride that could ride high on Blu-ray.

IMAX: Extreme will be released in the US in early November with specs to be announced.