"Corn dust is highly explosive"<br>Oh?,(reply>), Lots of dusts are highly explosive when suspended in air - if you want to try it, get a tin can and punch a hole in the lid. Put some corn powder in the tin, and put the top back on. Shake the tin to create a suspension of powder in the air then, from a safe distance, put the flame of a lighted taper to the hole. The resulting ignition will blow the lid off !<br>The Diesel engine was invented when Rudolf Diesel was trying to make an engine that ran on powdered coal dust . . . .,(reply>), If it's suspended in the air. Grain mills have been known to explode.