Question #127240. Asked by Lpez.
Last updated Oct 14 2012.
Originally posted Oct 14 2012 3:24 PM.
abechstein
Answer has 9 votes
Currently Best Answer
abechstein 16 year member
128 replies
Answer has 9 votes.
Currently voted the best answer.
Milk is heaver than cream because the water in skim milk is more dense than the fat in the cream. The fat separates naturally due to this difference in density, forming the cream (or this process can be accelerated through the use of a mechanical cream separator, essentially a centrifuge).
https://en.wikipedia.org/wiki/Milk#Creaming_and_homogenization