Lightning produces antimatter ?

Scientists have detected particles of antimatter over lightning on Earth, an unknown phenomenon, informs NASA. Researchers at NASA detected Gamma radiation with Fermi telescope's help. They believe that antimatter particles were formed inside the storm and lightning associated with them. 

"These signals are the first direct evidence that storms produce antimatter particles", said Michael Briggs,a member of the study team from the University of Alabama. The Fermi telescope is designed to monitor gamma rays, the highest given by light energy. When antimatter particles collide with normal matter, both particles are annihilated and converted into gamma radiation.