why hasn't the Pope's body exploded?

NewsMax.com: Inside Cover Story pope still looking cool?:

"Typically, corpses left in the open air can begin to swell and disintegrate - a rather unpleasant sight.
London's Guardian noted 'plenty of tales from history of exploding bodies (Henry VIII was apparently quite spectacular) and disintegrating cadavers (Pius XII turned black in 1958 and his nose fell off - and that was in October).'"

Very interesting. They can't embalm the Pope because he's after a sainthood and apparently in a fair few years time they'll dig him up and if he hasn't shown much sign of death, that's a sure fire sign he's a saint.