If they aren't eaten by grizzly bears, they return to cropland in the fall. Hundreds of traps are set in selected grainfields. The number of captured moths, combined with weather and other environmental factors, indicate the likelihood of a problem. Canada came up with the idea. MSU is now adapting it in a region made up of Montana, Nebraska, South Dakota, Wyoming, and Alberta.
Lively teaching can exact a toll.
Larry Kirkpatrick, lying on a bed of nails with a block on his chest, has been scratched by flying concrete. Another instructor, who wishes to remain anonymous, had his lips frozen together when he put liquid nitrogen in his mouth and tried to blow smoke. After his lips thawed, he had blisters for a week. Such demonstrations are staged to help students understand and remember the principles of physics. In the process, the instructors have faced flying bowling balls and ridden skateboards powered by fire extinguishers.