Scientists crack beer-froth enigma

guinness
Originally uploaded by jennyhu.

There is the nagging question of whether life exists other than on Earth. The enduring mystery of who made us -- and why.

And then there is this: Why does the foam on a pint of lager quickly disappear but the head on a pint of Guinness linger?

Answers to questions 1 and 2 are still being sought, but the Great Beer Riddle, at least, may soon be solved.