While there seems to be no official word from Discovery (other than my telephone lady) the narrative changes that were made by Sigourney included things like changing "200 meters deep" to "a tenth of a mile deep" and the like.

Bloody awful if you ask me That really stinks if you ask me.

Cheerio! Pip pip! What rubbish!

Sigourney Weaver is my absolute favorite living actress, but documentaries sound so much more authoritative when they're narrated by an englishman.

PAL & NTSC still matter on dvds unless you're using a computer monitor (pixels instead of lines) or a plasma tv. All other tv sets are still one or the other. DVD players don't care - they'll output whatever format is put in (that's where those pesky regions come in - Japan is NTSC, for example, but is region 2). There are plenty of cheap DVD players that will allow you to set the output - and will act as a converter. Most of those machines can also be set to region '0', effectively making region-encoding moot.

I thought it was also refresh rates... Pal refreshing at a different rate than NTSC (then again my intro book talked about the future going into digital and was made in the early 90s...)

I love region 0 DVDs... Esp when a friend makes them so your favorite British shows are set on 0 and let the DVD player set it for you... (I get the region 1 DVDs later...)

I don't get why discovery used all that B-roll then redid narration and edited scenes... seems more expensive than using direct BBC shows.

PAL has more lines than NTSC, but runs at 25 frames per second, as opposed to NTSC's (just under) 30 fps. This leads to an interesting phenomena when watching movies on video. The Wikipedia entry is as concise an explanation as I've ever read, so here it is:

OK, now you're just showing off Mousepod

:D