In a small lab at Penn State University, lightning may be happening on a scale smaller than a deck of cards. Victor Pasko, a professor of electrical engineering, and his team have shown that under ...

PORTLAND (WGME) -- With summer approaching, the threat of thunderstorms is becoming more likely. But how lightning actually forms is quite amazing. It starts with differences in charged electrons.

Inside a thunderstorm, warm air is forced upward in a strong updraft. As the air rises, ice and water particles collide inside the cloud, creating electrical charges. Those collisions build up ...

Aerosols are tiny droplets or solid particles suspended in the air, and they surround us constantly. Some are large enough to see, such as springtime pollen, while others, like viruses that circulate ...