For large commercial or industrial facilities that may not have windows or those that continue operations during the night shift, a power outage can create a kind of panic that ...

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.

An emergency exit slide "separated" from a Delta flight Friday, prompting an emergency return to New York City's John F. Kennedy Airport.

United Flight 2434 was heading to Chicago when an open door indicator light came on, causing pilots to make an emergency landing at Tampa International Airport.