Head & Shoulders

I think we need a really, really big bottle.

Millions of tons of dandruff are circling the Earth, blocking out sunlight, causing rain and spreading disease, startling new research shows.

Flaky as it may seem, the research - partly funded by the German government - may provide the solution to one of the world's most enduring pollution mysteries: the origin of much of the vast clouds of fine dust in the atmosphere. It suggests that more than half of the dust is a rich soup of organic detritus, including particles of decaying leaves, animal hair, dead skin and dandruff.