What Happens After You Die

Death
Pallor mortis
Algor mortis
Rigor mortis
Livor mortis
Fresh decomposition
Putrefaction
Black putrefaction
Butyric fermentation
Dry decomposition
Skeletonization
Fossilization and/or disintegration

Biodegradation and biomineralisation convert out body matter into other types of matter, and since conservation of energy applies, we never truly disappear. Luckily, cognition and sapience are gone at stage 1, or existence would suck a whole fuckload of shitty balls more than it already does.