PORTLAND, Maine (WMTW) - More purplish smoke has been spotted rising from the stacks at Ecomaine Friday morning. This is the second day the colorful vapor has been seen in lifting into the air in ...

Made from a mixture of gold, ammonia and chlorine, these explosives became notable for more than just their deadly potential – after detonating, they left behind a strange purple smoke unlike ...

Experiments on a highly explosive substance called fulminating gold reveal why its detonation produces unusual purple smoke 1. More than 400 years ago, alchemists discovered fulminating gold ...