We all know that thunderstorms can unleash incredible bursts of electricity in the form of lightning, but you may not have known that thunderstorms also generate invisible bursts of gamma ...

Dark lightning happens at cruising altitude for some planes. If a plane should pass near a bolt of dark lightning, said Pallu, its passengers could receive 0.3 sieverts of radiation in an instant.

Rare ‘dark lightning’ might briefly touch passengers when flying. Gamma-ray blasts from thunderstorms are the most energetic natural discharges on Earth ...

The dark side of ground currents is that they spread wide distances, so according to the National Weather Service, farm animals are often exposed to ground currents and killed.