KEMP, Texas, June 30, 2018 (GLOBE NEWSWIRE) -- Industrial lighting leader, Larson Electronics LLC, released an explosion proof emergency LED exit sign approved for use in C1D1/C2D1/C3 locations ...

It’s what’s powering the green glow of emergency exit lights. Tritium decays when one of its neutrons turns into a proton, turning it from a hydrogen isotope into a helium isotope.

Laura Levis died of an asthma attack right outside the Somerville Hospital emergency room in 2016. She couldn't find the correct entrance and wasn't located by hospital employees after she called 911.