Gamma Ray Burst
Most of us do not come into contact with gamma radiation on a daily basis. If you're not the Incredible Hulk, you generally don't know anything about it. Gamma rays, however, might seriously endanger the Earth.
A gamma ray burst is an electromagnetic explosion that results from the collision of two neutron stars or the collapse of a large star. The ozone layer may be torn away from the planet by a radiation explosion if it occurred close enough to the earth. We would then all be exposed to the sun's unfiltered UV rays as a result.
Gamma bursts produce ground ozone in addition to the hole they would rip in the universe. Because it is water soluble, that ozone may seep into the ocean or suffocate vegetation on the ground. That could result in the wholesale extinction of marine life.
