What causes the rumbles after a lightning strike? Here's the phenomenon of thunder, explained. Much is written about lightning — why it occurs, its potential for danger and how to avoid it. Yet we ...

Keep in mind that thunder is a compression, or shock wave...caused when lightning heats the air. A 'clap' comes from a single, straight lightning segment-often overhead. Rumbles, on the other hand, ...

Do you remember the last time you saw a rainstorm? Streaks of lightning… rumbles of thunder… the whole thing can be kind of scary, right? Do you sometimes want to hide under the covers? Well, today we ...