Before you worry too much: Most white streaks on nails are harmless. However, if you have similar lines on many nails or a pair of lines that runs all the way across the nail, these could be signs ...

What are those white lines behind airplanes? Debunking 'chemtrails' theory Contrails — the little white lines streaming out of an airplane — form when the hot air from the exhaust mixes with the ...

White lines on nails, medically referred to as leukonychia, are a common occurrence and are usually harmless. These lines can appear as small spots, horizontal bands, or lengthwise streaks, often ...