Lightning flashes streak across the sky in the German countryside. One large flash is mostly horizontal, another one is vertical. Sometimes lightning bolts can stretch hundreds of miles horizontally.

Add Yahoo as a preferred source to see more of our stories on Google. Illustration of a lightning bolt inside a laser beam. Multicolored beams radiate from a bright center and there are several ...

Picture this: You're stuck in traffic on a summer afternoon, checking the weather app on your phone as dark storm clouds roll in. You might think about power outages or possible flooding, but you ...