And what about the oily film on the surface of the tea, shimmering like gasoline on water? Should it cause concern? If you've been wondering about the reasons behind your tea foaming or the origin ...

In that example, the gasoline doesn’t mix with water, but sits on top of it ... Slate explains that these severed fibers only create a metallic sheen when the grooves between them are properly ...

Everyone has seen the iridescent rainbow patterns in an oil sheen on water.  Oil is hydrophobic, which repels water and doesn’t mix.  It spreads out across the surface of the water, and if ...