In Newspapers And Magazines

Riddle: Many different types of my last seven letters can be found in newspapers, magazines, & journals. Physicists have built devices to get me moving very fast. What am I?

Answer: Particles!

Source: https://www.riddles.com/656

Many different types of my last seven letters can be found in newspapers, magazines, & journals. Physicists have built devices to get me moving very fast. What am I? — In Newspapers and Magazines by Anonymous v1.

Riddle: Many different types of my last seven letters can be found in newspapers, magazines, & journals. Physicists have built devices to get me moving very fast. What am I? Answer: Particles! — by Anonymous v2.