For as long as people have watched storms roll across the sky, lightning has inspired awe and fear. You can see the flash and hear the thunder, but the true beginning of a lightning bolt has remained ...

Thunderstorms often begin to develop early in the day when the sun heats the air near the ground and pockets of warmer air start to rise in the atmosphere. When these pockets of air reach a certain ...

A green spectacle. With protective eyewear, ISTA PHD student Andrea Stöllner takes a glimpse into the experimental chamber (in the foreground) where two laser beams trap a single particle. One ...

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Add Yahoo as a preferred source to see more of our stories on Google. A Penn State-led study reveals the hidden chain reaction that starts lightning, linking electrons, X-rays, and gamma rays. (CREDIT ...

“We explained how photoelectric events occur, what conditions need to be in thunderclouds to initiate the cascade of electrons, and what is causing the wide variety of radio signals that we observe in ...