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Our cells are surrounded by a fragile membrane that's only 5 nanometers thick, 1/20 of a soap bubble.

The clusters can undergo phase separation and form dense, liquid droplets, which in turn merge into larger aggregations -- similar to how soap bubbles coalesce.

Over billions of years, gravity pulled additional material into those baryon-dense regions, and galaxies and galactic clusters preferentially formed along their boundaries in thin shells like dust settling on a soap bubble.

The hopes of the Vikings are as fleeting and ethereal as the snowflake-like soap bubbles that float down from the ceiling of the stadium before kickoff, giving the place a winter wonderland effect.

One example involves the skin of a soap bubble stretched over a surface.